subject:(Thermal degradation)

Texas A&M University

1. Eseltine, Dustin E. Effect of Using Inert and Non-Inert Gases on the Thermal Degradation and Fuel Properties of Biomass in the Torrefaction and Pyrolysis Region.

Degree: MS, Mechanical Engineering, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10551

► The research presented focuses on the use of Carbon-dioxide (CO₂), Nitrogen (N₂) and Argon (Ar) as purge gases for torrefaction. Torrefaction using CO₂ as a… (more)

▼ The research presented focuses on the use of Carbon-dioxide (CO₂), Nitrogen (N₂) and Argon (Ar) as purge gases for torrefaction. Torrefaction using CO₂ as a purge gas may further improve the fuel characteristics of the torrefied fuel when compared to N₂ and Ar (which are entirely inert), making it better suited for use as a fuel for co-firing with coal or gasification. Three different biomasses were investigated: Juniper wood chips, Mesquite wood chips, and forage Sorghum. Experiments were conducted using a thermo-gravimetric analyzer (TGA, TA Instruments Model Q-600) to determine the effect of the purge gas over a wide range of torrefaction temperatures (200-300°C). TGA weight traces (thermograms) showed an increased mass loss when using CO2 as a purge gas when compared to N₂. The increased mass loss when CO₂ was used is attributed to a hypothesized reaction between the CO₂ and fixed Carbon contained within the biomass. Torrefaction of biomass, using Ar as the purge gas, produced results similar to torrefaction using N₂. Derivative Thermo-Gravimetric analysis (DTG) was done to determine the temperature ranges over which the three main components of biomass (hemicellulose, cellulose, and lignin) decomposed. The DTG results are in agreement with previously published research. From TGA thermograms and DTG analysis it was determined that torrefaction at higher temperatures (>260°C) likely result in the breakdown of cellulose during torrefaction, an undesired outcome. Proximate, ultimate, and heat value analysis was done on all three biomasses. All three contain a relatively high Oxygen content, which serves to decrease the higher heating value (HHV) of the biomass. The HHV of Juniper, Mesquite, and Sorghum on a dry ash-free (DAF) basis were 20,584 kJ/kg, 20,128 kJ/kg, and 19,389 kJ/kg respectively. The HHV of the three biomasses were relatively constant as expected for agricultural biomass. From TGA analysis (thermograms and DTG), an optimal torrefaction temperature was determined (240°C) based upon the amount of mass lost during torrefaction and estimates of energy retained. Batch torrefaction of all three biomasses at the optimal torrefaction temperature was completed using a laboratory oven. All three biomasses were torrefied using CO₂, N₂, and Ar as a purge gas. Proximate, ultimate, and heat value analysis was done for each of the torrefied fuels and compared. Results of the fuel property analysis showed torrefaction reduced the moisture content and oxygen percentage of the fuel resulting in the torrefied biomass having a larger HHV when compared to raw biomass. Due to inherent mass lost during torrefaction, the amount of energy retained in the torrefied biomass was calculated to determine the percentage of the virgin biomass energy content that remained. Torrefaction using CO2 resulted in the lowest amount of energy retention of all three purge gases tested (78.86% for Juniper); conversely, Nitrogen resulted in the highest amount of energy retention (91.81% for Sorghum.) Torrefaction of the biomass also increased… Advisors/Committee Members: Ranjan, Devesh (advisor), Annamalai, Kalyan (advisor), Jacobs, Timothy (committee member), Capareda, Sergio (committee member), Ansley, James (committee member).

Subjects/Keywords: Torrefaction; Biomass Torrefaction; thermal degradation

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APA (6^th Edition):

Eseltine, D. E. (2012). Effect of Using Inert and Non-Inert Gases on the Thermal Degradation and Fuel Properties of Biomass in the Torrefaction and Pyrolysis Region. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10551

Chicago Manual of Style (16^th Edition):

Eseltine, Dustin E. “Effect of Using Inert and Non-Inert Gases on the Thermal Degradation and Fuel Properties of Biomass in the Torrefaction and Pyrolysis Region.” 2012. Masters Thesis, Texas A&M University. Accessed April 10, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10551.

MLA Handbook (7^th Edition):

Eseltine, Dustin E. “Effect of Using Inert and Non-Inert Gases on the Thermal Degradation and Fuel Properties of Biomass in the Torrefaction and Pyrolysis Region.” 2012. Web. 10 Apr 2021.

Vancouver:

Eseltine DE. Effect of Using Inert and Non-Inert Gases on the Thermal Degradation and Fuel Properties of Biomass in the Torrefaction and Pyrolysis Region. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10551.

Council of Science Editors:

Eseltine DE. Effect of Using Inert and Non-Inert Gases on the Thermal Degradation and Fuel Properties of Biomass in the Torrefaction and Pyrolysis Region. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10551

Oregon State University

2. Sinha, Arijit. The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites.

Degree: PhD, Wood Science, 2010, Oregon State University

URL: http://hdl.handle.net/1957/19572

► Engineers, in practice, are often faced with the challenge of evaluating a fire-damaged structure and developing a rehabilitation and retrofit plan. In order to decide… (more)

▼ Engineers, in practice, are often faced with the challenge of evaluating a fire-damaged structure and developing a rehabilitation and retrofit plan. In order to decide on a rehabilitation and retrofit plan, information on thermal degradation of building materials and connections are vital. A critical knowledge gap exists in terms of thermal degradation of materials and connections with respect to light-frame wood construction. Along with solid sawn lumber (SSL), various wood-based composites such as plywood, oriented strand board (OSB) and laminated veneer lumber (LVL) are also used in wood-frame construction. Characterization of the thermal degradation of strength of these structural materials will help assess the service life and strength of the damaged structure. This study addressed the thermal degradation of material strength and connection strength by conducting tests on wood, wood-based composites and connections after subjecting them to elevated temperatures, hence studying the post-fire residual strength in wood and wood composite construction. The properties evaluated in this study were bending strength (MOR), bending stiffness (MOE), lateral nail capacity, dowel bearing strength, fracture toughness and bond strength (IB) after exposing the materials to elevated temperature for various exposure times. In addition, the bending strength of OSB and plywood was studied in great detail as a function of additional temperatures and exposure times. A general trend of degrading bending properties, fracture toughness, dowel bearing strength of materials and yield strength of the connections of various configurations with high temperature and duration of exposure was observed and confirmed by statistical analysis. A statistical regression based model incorporating the effects of temperature, time of exposure and thier interaction and a model based on first-order kinetics were developed and evaluated for predicting the strength loss. The kinetics-based model was better than the regression-based approach. Using the kinetics analysis along with time-temperature superposition for OSB and plywood, a master curve was generated at a reference temperature of 150°C that can be used for residual strength estimates and failure time predictions. A reasonable prediction of connection design values was made using National Design Specifications (NDS) yield models for thermally degraded materials. Conventional tests for bond strength provided excessive scatter which renders any statistical comparison highly difficult. An alternative to IB and bond classification could be fracture testing using energy methods for wood bond strength evaluation. The various analytical models developed will help for characterizing the thermal degradation of material properties. Models specified in design codes were evaluated against the thermal degradation of materials. This knowledge of thermal degradation and the models will help engineers and architects in recommending categorical improvement, rehabilitation and retrofit of structures. Advisors/Committee Members: Gupta, Rakesh (advisor), Kamke, Fred (committee member).

Subjects/Keywords: Thermal Degradation; Wood – Mechanical properties

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sinha, A. (2010). The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/19572

Chicago Manual of Style (16^th Edition):

Sinha, Arijit. “The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites.” 2010. Doctoral Dissertation, Oregon State University. Accessed April 10, 2021. http://hdl.handle.net/1957/19572.

MLA Handbook (7^th Edition):

Sinha, Arijit. “The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites.” 2010. Web. 10 Apr 2021.

Vancouver:

Sinha A. The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites. [Internet] [Doctoral dissertation]. Oregon State University; 2010. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/1957/19572.

Council of Science Editors:

Sinha A. The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites. [Doctoral Dissertation]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/19572

University of Texas – Austin

3. Freeman, Stephanie Anne. Thermal degradation and oxidation of aqueous piperazine for carbon dioxide capture.

Degree: PhD, Chemical Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-05-3290

► Absorption-stripping with aqueous, concentrated piperazine (PZ) is a viable retrofit technology for post-combustion CO2 capture from coal-fired power plants. The rate of thermal degradation and… (more)

▼ Absorption-stripping with aqueous, concentrated piperazine (PZ) is a viable retrofit technology for post-combustion CO2 capture from coal-fired power plants. The rate of thermal degradation and oxidation of PZ was investigated over a range of temperature, CO2 loading, and PZ concentration. At 135 to 175 °C, degradation is first order in PZ with an activation energy of 183.5 kJ/mole. At 150 °C, the first order rate constant, k1, for thermal degradation of 8 m PZ with 0.3 mol CO2/mol alkalinity is 6.12 × 10-9 s-1. After 20 weeks of degradation at 165 °C, 74% and 63%, respectively, of the nitrogen and carbon lost in the form of PZ and CO2 was recovered in quantifiable degradation products. N-formylpiperazine, ammonium, and N-(2-aminoethyl) piperazine account for 57% and 45% of nitrogen and carbon lost, respectively. Thermal degradation of PZ likely proceeds through SN2 substitution reactions. In the suspected first step of the mechanism, 1-[2-[(2-aminoethyl) amino]ethyl] PZ is formed from a ring opening SN2 reaction of PZ with H+PZ. Formate was found to be generated during thermal degradation from CO2 or CO2-containing molecules. An analysis of k1 values was applied to a variety of amines screened for thermal stability in order to predict a maximum recommended stripper temperature. Morpholine, piperidine, PZ, and PZ derivatives were found to be the most stable with an allowable stripper temperature above 160 °C. Long-chain alkyl amines or alkanolamines such as N-(2-hydroxyethyl)ethylenediamine and diethanolamine were found to be the most unstable with an allowable stripper temperature below 120 °C. Iron (Fe2+) and stainless steel metals (Fe2+, Ni2+, and Cr3+) were found to be only weak catalysts for oxidation of PZ, while oxidation was rapidly catalyzed by copper (Cu2+). In a system with Fe2+ or SSM, 5 kPa O2 in the inlet flue gas, a 55 °C absorber, and one-third residence time with O2, the maximum loss rate of PZ is expected to 0.23 mol PZ/kg solvent in one year of operation. Under the same conditions but with Cu2+ present, the loss rate of PZ is predicted to be 1.23 mole PZ/kg solvent in one year of operation. Inhibitor A was found to be effective at decreasing PZ loss catalyzed by Cu2+. Ethylenediamine, carboxylate ions, and amides were the only identified oxidation products. Total organic carbon analysis and overall mass balances indicate a large concentration of unidentified oxidation products. Advisors/Committee Members: Rochelle, Gary T. (advisor), Maynard, Jennifer A. (committee member), Reible, Danny D. (committee member), Katz, Lynn E. (committee member), Critchfield, James (committee member).

Subjects/Keywords: Degradation; Thermal degradation; Oxidation; Amine degradation; Thermal stability; Piperazine; PZ; CO2 capture; Carbon dioxide capture

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Freeman, S. A. (2011). Thermal degradation and oxidation of aqueous piperazine for carbon dioxide capture. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-05-3290

Chicago Manual of Style (16^th Edition):

Freeman, Stephanie Anne. “Thermal degradation and oxidation of aqueous piperazine for carbon dioxide capture.” 2011. Doctoral Dissertation, University of Texas – Austin. Accessed April 10, 2021. http://hdl.handle.net/2152/ETD-UT-2011-05-3290.

MLA Handbook (7^th Edition):

Freeman, Stephanie Anne. “Thermal degradation and oxidation of aqueous piperazine for carbon dioxide capture.” 2011. Web. 10 Apr 2021.

Vancouver:

Freeman SA. Thermal degradation and oxidation of aqueous piperazine for carbon dioxide capture. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2011. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3290.

Council of Science Editors:

Freeman SA. Thermal degradation and oxidation of aqueous piperazine for carbon dioxide capture. [Doctoral Dissertation]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3290

Brunel University

4. Duangphet, Sitthi. Extrusion foaming of bioplastics for lightweight structure in food packaging.

Degree: PhD, 2012, Brunel University

URL: http://bura.brunel.ac.uk/handle/2438/7350 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569673

► This thesis reports the systematic approaches to overcome the key drawbacks of the pure PHBV, namely low crystallisation rate, tensile strength, ductility, melt viscosity, thermal… (more)

Subjects/Keywords: 664; Crystallization; Rheology; Thermal degradation; Tensile testing

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APA (6^th Edition):

Duangphet, S. (2012). Extrusion foaming of bioplastics for lightweight structure in food packaging. (Doctoral Dissertation). Brunel University. Retrieved from http://bura.brunel.ac.uk/handle/2438/7350 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569673

Chicago Manual of Style (16^th Edition):

Duangphet, Sitthi. “Extrusion foaming of bioplastics for lightweight structure in food packaging.” 2012. Doctoral Dissertation, Brunel University. Accessed April 10, 2021. http://bura.brunel.ac.uk/handle/2438/7350 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569673.

MLA Handbook (7^th Edition):

Duangphet, Sitthi. “Extrusion foaming of bioplastics for lightweight structure in food packaging.” 2012. Web. 10 Apr 2021.

Vancouver:

Duangphet S. Extrusion foaming of bioplastics for lightweight structure in food packaging. [Internet] [Doctoral dissertation]. Brunel University; 2012. [cited 2021 Apr 10]. Available from: http://bura.brunel.ac.uk/handle/2438/7350 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569673.

Council of Science Editors:

Duangphet S. Extrusion foaming of bioplastics for lightweight structure in food packaging. [Doctoral Dissertation]. Brunel University; 2012. Available from: http://bura.brunel.ac.uk/handle/2438/7350 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569673

5. Duangphet, Sitthi. Extrusion foaming of bioplastics for lightweight structure in food packaging.

Degree: 2012, Brunel University London

URL: http://bura.brunel.ac.uk/handle/2438/7350

► This thesis reports the systematic approaches to overcome the key drawbacks of the pure PHBV, namely low crystallisation rate, tensile strength, ductility, melt viscosity, thermal… (more)

▼ This thesis reports the systematic approaches to overcome the key drawbacks of the pure PHBV, namely low crystallisation rate, tensile strength, ductility, melt viscosity, thermal stability and high materials cost. The physical, mechanical, thermal, and rheological properties of the pure PHBV were studied systematically first to lay a solid foundation for formulation development. The influence of blending with other biopolymers, inclusion of filler, and chain extender additives in terms of mechanical properties, rheology, thermal decomposition and crystallization kinetics were then followed. Creating lightweight structures by foaming is considered to be one of the effective ways to reduce material consumption, hence the reduction of density and morphology of PHBV-based foams using extrusion foaming technique were studied comprehensively in terms of extrusion conditions (temperature profiles, screw speed and material feeding rate) and the blowing agent content. The material cost reduction was achieved by adding low-cost filler (e.g. CaCO3) and reduction of density by foaming. The thermal instability was enhanced by incorporation of chain extender (e.g. Joncryl) and blending with a high thermal stability biopolymer (e.g. PBAT). The polymer blend also improved the ductility. Adding nucleation agent enhanced the crystallization rate to reduce stickiness of extruded sheet. The final formulation (PHBV/PBAT/CaCO3 composite) was successfully extruded into high quality sheet and thermoformed to produce prototype trays in an industrial scale trial. The effect of the extrusion conditions (temperature profiles, screw speed and material feeding rate) and the blowing agent content are correlated to the density reduction of the foams. 61 and 47 % density reduction were achieved for the commercial PHBV and the PHBV/PBAT/CaCO3 composite respectively and there exists further scope for more expansion if multiple variable optimisation of the conditions are carried out. Advisors/Committee Members: Song, J (advisor), Tarverdi, K (advisor).

Subjects/Keywords: PHBV; Crystallization; Rheology; Thermal degradation; Tensile testing

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APA (6^th Edition):

Duangphet, S. (2012). Extrusion foaming of bioplastics for lightweight structure in food packaging. (Thesis). Brunel University London. Retrieved from http://bura.brunel.ac.uk/handle/2438/7350

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Duangphet, Sitthi. “Extrusion foaming of bioplastics for lightweight structure in food packaging.” 2012. Thesis, Brunel University London. Accessed April 10, 2021. http://bura.brunel.ac.uk/handle/2438/7350.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Duangphet, Sitthi. “Extrusion foaming of bioplastics for lightweight structure in food packaging.” 2012. Web. 10 Apr 2021.

Vancouver:

Duangphet S. Extrusion foaming of bioplastics for lightweight structure in food packaging. [Internet] [Thesis]. Brunel University London; 2012. [cited 2021 Apr 10]. Available from: http://bura.brunel.ac.uk/handle/2438/7350.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Duangphet S. Extrusion foaming of bioplastics for lightweight structure in food packaging. [Thesis]. Brunel University London; 2012. Available from: http://bura.brunel.ac.uk/handle/2438/7350

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

6. Schuhler, Eliot. Dégradation des matériaux composites sous l'effet d'une flamme : application à la réaction aux feux des composites utilisés pour les transports et l'énergie : Behaviour of composite materials subjected to fire : application to the fire property of composite laminates used in aerospace and energy branches.

Degree: Docteur es, Energétique, 2019, Normandie

URL: http://www.theses.fr/2019NORMIR27

►

L’utilisation des matériaux composites à matrice polymère dans l’industrie aéronautique offre de nombreux avantages en termes de gain de masse et de résistance à la… (more)

Subjects/Keywords: Dégradation thermique; Thermoplastic; Composite; Pyrolysis; Thermal degradation

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APA (6^th Edition):

Schuhler, E. (2019). Dégradation des matériaux composites sous l'effet d'une flamme : application à la réaction aux feux des composites utilisés pour les transports et l'énergie : Behaviour of composite materials subjected to fire : application to the fire property of composite laminates used in aerospace and energy branches. (Doctoral Dissertation). Normandie. Retrieved from http://www.theses.fr/2019NORMIR27

Chicago Manual of Style (16^th Edition):

Schuhler, Eliot. “Dégradation des matériaux composites sous l'effet d'une flamme : application à la réaction aux feux des composites utilisés pour les transports et l'énergie : Behaviour of composite materials subjected to fire : application to the fire property of composite laminates used in aerospace and energy branches.” 2019. Doctoral Dissertation, Normandie. Accessed April 10, 2021. http://www.theses.fr/2019NORMIR27.

MLA Handbook (7^th Edition):

Schuhler, Eliot. “Dégradation des matériaux composites sous l'effet d'une flamme : application à la réaction aux feux des composites utilisés pour les transports et l'énergie : Behaviour of composite materials subjected to fire : application to the fire property of composite laminates used in aerospace and energy branches.” 2019. Web. 10 Apr 2021.

Vancouver:

Schuhler E. Dégradation des matériaux composites sous l'effet d'une flamme : application à la réaction aux feux des composites utilisés pour les transports et l'énergie : Behaviour of composite materials subjected to fire : application to the fire property of composite laminates used in aerospace and energy branches. [Internet] [Doctoral dissertation]. Normandie; 2019. [cited 2021 Apr 10]. Available from: http://www.theses.fr/2019NORMIR27.

Council of Science Editors:

Schuhler E. Dégradation des matériaux composites sous l'effet d'une flamme : application à la réaction aux feux des composites utilisés pour les transports et l'énergie : Behaviour of composite materials subjected to fire : application to the fire property of composite laminates used in aerospace and energy branches. [Doctoral Dissertation]. Normandie; 2019. Available from: http://www.theses.fr/2019NORMIR27

RMIT University

7. Rezaei, M. Oxo-biodegradation of clay-based polyethylene nanocomposites.

Degree: 2012, RMIT University

URL: http://researchbank.rmit.edu.au/view/rmit:160917

► Polyethylene is the most widely used polymer in various industrial and day-to-day consumer applications. However, the widespread use of polyethylene has led to a problem… (more)

▼ Polyethylene is the most widely used polymer in various industrial and day-to-day consumer applications. However, the widespread use of polyethylene has led to a problem called â€˜plastic pollutionâ€™. Among the several strategies used to solve the plastic pollution, the most effective one seems to be the production of degradable plastics. Degradable plastics are made by blending polymer with additives such as metal ions and naturally biodegradable polymers which enhance the degradability of plastics. Degradable polyethylene disintegrates into smaller fragments in the presence of heat, light and oxygen. However, these small fragments remain in the environment for very long period and contaminate soil and water. To make polyethylene completely biodegradable, the smaller fragments must be made consumable to microorganisms which convert them into CO2 and water during their metabolism. Current knowledge on the mechanisms of polyethylene biodegradation is far from complete and therefore more research is required in this area. Previous studies on polyethylene degradability have shown that degradability is enhanced remarkably by incorporating metal ions called pro-oxidant into the polymer matrix. Recent studies showed that clay-based polyethylene nanocomposites have better biodegradability. The role of clay, however, on the degradation of polyethylene has not been completely understood yet. The main objective of this work is to investigate the combined effects of manganese stearate as pro-oxidant and nanoclay on polyethylene biodegradation. It is also aimed to develop a mathematical model for predicting the biodegradation rate of oxo-biodegradable polyethylene nanocomposites (nanocomposites with pro-oxidant) using the experimental data. Films of polyethylene nanocomposites and oxo-biodegradable polyethylene nanocomposites were prepared using melt intercalation followed by film blowing. Biodegradation study was carried out in two stages: abiotic stage and biotic stage. Abiotic degradation was achieved by subjecting the film samples to heat at 70Â°C. Thermally degraded samples were then subjected to biodegradation in a closely monitored composting system according to AS-ISO 14855. Thermally degraded samples were subjected to TGA and FTIR analysis. Biodegradation was monitored by measuring the volume of CO2 produced as a function of time. Biodegraded film samples were also subjected to ESEM (bio-film growth) and FTIR analysis. Experimental results show that manganese stearate helps in different aspects of both abiotic and biotic stages of biodegradation.Â However, the presence of clay itself has no significant effect on the thermal degradation of polyethylene nanocomposites. But nanoclay has been found to enhance the overall degradation by either catalysing the thermal oxidation or making the material suitable for the growth of microorganisms. Extensive degradation observed in oxo-biodegradable nanocomposites indicates that co-existence of manganese stearate and nanoclay in polyethylene structure is vital to achieve an…

Subjects/Keywords: Fields of Research; Polyethylene; Nanocomposites; Degradation; Biodegradation; Thermal degradation; Modeling; Composting

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APA (6^th Edition):

Rezaei, M. (2012). Oxo-biodegradation of clay-based polyethylene nanocomposites. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:160917

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rezaei, M. “Oxo-biodegradation of clay-based polyethylene nanocomposites.” 2012. Thesis, RMIT University. Accessed April 10, 2021. http://researchbank.rmit.edu.au/view/rmit:160917.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rezaei, M. “Oxo-biodegradation of clay-based polyethylene nanocomposites.” 2012. Web. 10 Apr 2021.

Vancouver:

Rezaei M. Oxo-biodegradation of clay-based polyethylene nanocomposites. [Internet] [Thesis]. RMIT University; 2012. [cited 2021 Apr 10]. Available from: http://researchbank.rmit.edu.au/view/rmit:160917.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rezaei M. Oxo-biodegradation of clay-based polyethylene nanocomposites. [Thesis]. RMIT University; 2012. Available from: http://researchbank.rmit.edu.au/view/rmit:160917

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

8. Lu, Jin-Shan. Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of 2-methyl-1,3-Propylene Succinate.

Degree: PhD, Materials and Optoelectronic Science, 2012, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811112-113851

► Poly(butylene succinate) (PBSu), poly(2-methyl-1,3-propylene succinate) (PMPSu), and their two novel poly(butylene succinate-co-2-methyl-1,3-propylene succinate)s (PBMPSu 95/05 and PBMPSu 90/10) were synthesized by a two-stage esterification reaction.… (more)

▼ Poly(butylene succinate) (PBSu), poly(2-methyl-1,3-propylene succinate) (PMPSu), and their two novel poly(butylene succinate-co-2-methyl-1,3-propylene succinate)s (PBMPSu 95/05 and PBMPSu 90/10) were synthesized by a two-stage esterification reaction. PBMPSu 95/05 and PBMPSu 90/10 were characterized as having 6.5 and 10.8 mol% 2-methyl-1,3-propylene succinate (MPS) units, respectively, by 1H NMR. These copolymers were characterized to be random from the 13C NMR spectra. In this study, the nonisothermal crystallization and thermal degradation behaviors of the polyesters were investigated via different approaches. A differential scanning calorimeter (DSC) and a polarized light microscope (PLM) were employed to investigate the nonisothermal crystallization of these copolyesters and neat PBSu. Morphology and the isothermal growth rates of spherulites under PLM experiments at three cooling rates of 1, 2.5 and 5 Â°C/min were monitored and obtained by curve-fitting. These continuous rate data were analyzed with the Lauritzen-Hoffman equation. A transition of regime II â III was found at 96.2, 83.5, and 77.9 Â°C for PBSu, PBMPSu 95/05, and PBMPSu 90/10, respectively. DSC exothermic curves at five cooling rates of 1, 2.5, 5, 10 and 20 Â°C/min show that almost all of the nonisothermal crystallization occurred in regime III. DSC data were analyzed using modified Avrami, Tobin, Ozawa, Mo, Friedman and Vyazovkin equations. All the results of PLM and DSC measurements reveal that incorporation of minor MPS units into PBSu markedly inhibits the crystallization of the resulting polymer. The nonisothermal crystallization behavior of these polyesters was also investigated using a Fourier-transform infrared spectrometer (FTIR) with an attenuated total reflection (ATR). The absorbance peaks of crystals for the Î± form (918, 955, and 1045 cm-1) of PBSu and PBMPSu copolyesters were observed by ATR-FTIR under nonisothermal crystallization. When these semicrystalline polyesters started to be solidified from the melt state, these characteristic absorption bands for PBSu and its copolyesters crystals have been detected. In this study, the thermal degradation mechanisms of PBSu, PMPSu, PBMPSu 95/05, and PBMPSu 90/10 were investigated using a thermogravimetric analyzer combined Fourier-transform infrared spectrometer (TGA-FTIR) and a pyrolysis-gas chromatographyâmass spectrometry (Py-GC-MS). The volatile products evolved from the thermal degradation of these two copolyesters were identified to be anhydride, ether, ester, alcohol, alkene, aldehyde, and CO2. FTIR spectra displayed that the main degradation products for these four polymers were anhydrides. Moreover, PBSu-rich PBMPSu copolymers exhibited the same thermal degradation mechanism as that of PBSu at lower thermal degradation temperatures (< 403 ºC) and as that of PMPSu at higher thermal degradation temperatures (> 403 ºC) by the TGA-FTIR analysis. The results of the TGA-FTIR analysis clearly demonstrates that the influence of MPS units on the thermal degradation process is gradually… Advisors/Committee Members: Fang-Chyou Chiu (chair), Feng-Er Yu (chair), Chang-Mou Wu (chair), An-Chung Su (chair), Ming Chen (committee member), Tzong-Ming Wu (chair).

Subjects/Keywords: polyesters; copolyesters; nonisothermal; crystallization; kinetics; thermal degradation; degradation mechanism

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lu, J. (2012). Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of 2-methyl-1,3-Propylene Succinate. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811112-113851

Chicago Manual of Style (16^th Edition):

Lu, Jin-Shan. “Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of 2-methyl-1,3-Propylene Succinate.” 2012. Doctoral Dissertation, NSYSU. Accessed April 10, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811112-113851.

MLA Handbook (7^th Edition):

Lu, Jin-Shan. “Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of 2-methyl-1,3-Propylene Succinate.” 2012. Web. 10 Apr 2021.

Vancouver:

Lu J. Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of 2-methyl-1,3-Propylene Succinate. [Internet] [Doctoral dissertation]. NSYSU; 2012. [cited 2021 Apr 10]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811112-113851.

Council of Science Editors:

Lu J. Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of 2-methyl-1,3-Propylene Succinate. [Doctoral Dissertation]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0811112-113851

KTH

9. SHOJAEE, Maryam. Modelling for the thermal degradation of engine oil in diesel engines.

Degree: Chemical Science and Engineering (CHE), 2015, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175385

► Thermal oil oxidation is an important reason for the engine oil degradation in trucks. Having a comprehensive model that includes all the influential factors… (more)

▼ Thermal oil oxidation is an important reason for the engine oil degradation in trucks. Having a comprehensive model that includes all the influential factors while it is feasible for being implemented in the ECUs, was aimed for this work. Therefore, the chemical investigating of the problem leaded to propose a first kinetic model and its thermal analysis caused modelling the oil thermal behaviour. The latter was developed for four compartments: Bearings, turbocharger, piston cooling and oil sump in the oil path through the lubrication system, because the highest oil temperature happens due to friction, combustion of fuels and exhaust gas transportation. Independency from the design parameters of the compartments and simplicity of models for the ECU implementation caused to investigate two various modelling hybrid approach: physical modelling and control theory approach. The first one was done for the bearings and piston cooling, and showed a high level of complexity leading to switch to the second approach. The latter was applied for all compartments while it satisfied requested requirements. To adjust and evaluate the models, an experimental campaign was devoted to acquiring the needed parameters with consideration of the project budget. Also using the previous simulation and experimental efforts at the company provided a possibility to develop flow rate sub-models used in the thermal modelling. The proposed model for all compartments, well predicted the oil thermal behaviour for both stationary and dynamic operating conditions. A comparison between the experimental data for the oil in the oil sump and turbo charger was done to show the reliability of the related models in both stationary and transient statuses. For the bearings, the simulation data for stationary condition were applied as a reference. The modelled oil temperature after piston cooling was compared to a set of experimental data that presented the probable temperature in some conditions close to stationary operating points.

Subjects/Keywords: Diesel engine; engine oil degradation; thermal degradation; control

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APA (6^th Edition):

SHOJAEE, M. (2015). Modelling for the thermal degradation of engine oil in diesel engines. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175385

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

SHOJAEE, Maryam. “Modelling for the thermal degradation of engine oil in diesel engines.” 2015. Thesis, KTH. Accessed April 10, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175385.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

SHOJAEE, Maryam. “Modelling for the thermal degradation of engine oil in diesel engines.” 2015. Web. 10 Apr 2021.

Vancouver:

SHOJAEE M. Modelling for the thermal degradation of engine oil in diesel engines. [Internet] [Thesis]. KTH; 2015. [cited 2021 Apr 10]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175385.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

SHOJAEE M. Modelling for the thermal degradation of engine oil in diesel engines. [Thesis]. KTH; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175385

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universitat Politècnica de València

10. Santonja Blasco, Laura. Contribution to the study of thermal, biological and photo degradation of polylactide .

Degree: 2012, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/16470

► El propósito de la presente tesis doctoral es estudiar el efecto de la degradación térmica, biológica y fotolítica en la polilactida (PLA) para contribuir a… (more)

▼ El propósito de la presente tesis doctoral es estudiar el efecto de la degradación térmica, biológica y fotolítica en la polilactida (PLA) para contribuir a la caracterización de este polímero biodegradable bajo diferentes condiciones o entornos. Este polímero procede de fuentes renovables y está considerado un excelente candidato para sustituir a otros materiales poliméricos con escasa degradabilidad. En este estudio se describen los mecanismos que regulan cada tipo de degradación y, lo que es más importante, cómo cada uno de ellos afecta a la variación de la masa molar del PLA. La monitorización del descenso de masa molar de polilactida se realizó tanto mediante Cromatografía de Permeación en Gel (GPC) como por Viscosimetría. Adicionalmente se utilizó la Espectroscopía Infrarroja con Transformada de Fourier (FTIR) para establecer los mecanismos que controlan la degradación y su efecto en la estructura química de la polilactida. Asimismo, se ha determinado el impacto de cada tipo de degradación en la morfología y en las propiedades térmicas y mecánicas del PLA. La Termogravimetría (TGA) permitió monitorizar los cambios en la estabilidad térmica del material debidos a los diferentes tipos degradación, ulilizando parámetros como la temperatura de máxima velocidad de degradación térmica o la energía de activación. El resultado de la bio y la foto degradación en la superficie del material fue evaluado mediante Microscopía Electrónica de Barrido (SEM), observándose únicamente cambios debidos a la degradación biológica. Las propiedades viscoelásticas y térmicas se analizaron mediante Análisis Dinámico-Mecánico-Térmico (DMTA), Calorimetría Diferencial de Barrido (DSC) y Microscopía Óptica (OM). Se ha obtenido que los parámetros más relevantes para discernir las diferencias entre los tres procesos de degradación son los relativos al fenómeno de cristalización. Los resultados muestran que cada degradación está controlada por un mecanismo que afecta de diferente forma a la Advisors/Committee Members: Ribes Greus, María Desamparados (advisor).

Subjects/Keywords: Polylactide; Biodegradation; Photodegradation; Thermal degradation; Biodegradable polymers; Crystallization; Degradation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Santonja Blasco, L. (2012). Contribution to the study of thermal, biological and photo degradation of polylactide . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/16470

Chicago Manual of Style (16^th Edition):

Santonja Blasco, Laura. “Contribution to the study of thermal, biological and photo degradation of polylactide .” 2012. Doctoral Dissertation, Universitat Politècnica de València. Accessed April 10, 2021. http://hdl.handle.net/10251/16470.

MLA Handbook (7^th Edition):

Santonja Blasco, Laura. “Contribution to the study of thermal, biological and photo degradation of polylactide .” 2012. Web. 10 Apr 2021.

Vancouver:

Santonja Blasco L. Contribution to the study of thermal, biological and photo degradation of polylactide . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2012. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10251/16470.

Council of Science Editors:

Santonja Blasco L. Contribution to the study of thermal, biological and photo degradation of polylactide . [Doctoral Dissertation]. Universitat Politècnica de València; 2012. Available from: http://hdl.handle.net/10251/16470

Univerzitet u Beogradu

11. Zdravković, Jelena D., 1985-. Mehanizam i kinetika termički aktivirane razgradnje kompleksa prelaznih metala sa anjonima aromatičnih polikarboksilnih kiselina.

Degree: Tehnološko-metalurški fakultet, 2018, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:17897/bdef:Content/get

►

Tehnološko inženjerstvo - Inženjerstvo materijala / Technological Engineering - Materials Engineering

U disertaciji je ispitana termička stabilnost pet kompleksa prelaznih metala (Cu, Ni i Zn)… (more)

Subjects/Keywords: Transition metal complexes; Thermal analysis; Thermal stability; Mechanism and kinetics of thermal degradation; Deconvolution

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APA (6^th Edition):

Zdravković, Jelena D., 1. (2018). Mehanizam i kinetika termički aktivirane razgradnje kompleksa prelaznih metala sa anjonima aromatičnih polikarboksilnih kiselina. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:17897/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zdravković, Jelena D., 1985-. “Mehanizam i kinetika termički aktivirane razgradnje kompleksa prelaznih metala sa anjonima aromatičnih polikarboksilnih kiselina.” 2018. Thesis, Univerzitet u Beogradu. Accessed April 10, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:17897/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zdravković, Jelena D., 1985-. “Mehanizam i kinetika termički aktivirane razgradnje kompleksa prelaznih metala sa anjonima aromatičnih polikarboksilnih kiselina.” 2018. Web. 10 Apr 2021.

Vancouver:

Zdravković, Jelena D. 1. Mehanizam i kinetika termički aktivirane razgradnje kompleksa prelaznih metala sa anjonima aromatičnih polikarboksilnih kiselina. [Internet] [Thesis]. Univerzitet u Beogradu; 2018. [cited 2021 Apr 10]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:17897/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zdravković, Jelena D. 1. Mehanizam i kinetika termički aktivirane razgradnje kompleksa prelaznih metala sa anjonima aromatičnih polikarboksilnih kiselina. [Thesis]. Univerzitet u Beogradu; 2018. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:17897/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

12. Chiu, Sheng-Hui. Thermal degradation mechanism of polyesters.

Degree: Master, Materials and Optoelectronic Science, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101116-165249

► Abstract In this study, the mechanisms and kinetics of thermal degradation of the homopolyesters and copolyesters with different amounts of Î²-hydrogen were examined using thermogravimetric… (more)

Subjects/Keywords: polyesters; copolyesters; low temperature plasma; thermal degradation; Î²-hydrogen bond scission; degradation mechanism

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APA (6^th Edition):

Chiu, S. (2016). Thermal degradation mechanism of polyesters. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101116-165249

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chiu, Sheng-Hui. “Thermal degradation mechanism of polyesters.” 2016. Thesis, NSYSU. Accessed April 10, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101116-165249.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chiu, Sheng-Hui. “Thermal degradation mechanism of polyesters.” 2016. Web. 10 Apr 2021.

Vancouver:

Chiu S. Thermal degradation mechanism of polyesters. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Apr 10]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101116-165249.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chiu S. Thermal degradation mechanism of polyesters. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101116-165249

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh

13. Iliopoulou, Ioanna. Improving the stability of the black carrot (Daucus carota L.) colourant.

Degree: PhD, 2016, University of Edinburgh

URL: http://hdl.handle.net/1842/17975

► The replacement of artificial with natural dyes is one of the most challenging research fields in the food production area. Recent studies have shown that… (more)

Subjects/Keywords: 664; artificial dyes; black carrot degradation; CIE color measurements; thermal degradation; UV/vis spectroscopy

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APA (6^th Edition):

Iliopoulou, I. (2016). Improving the stability of the black carrot (Daucus carota L.) colourant. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/17975

Chicago Manual of Style (16^th Edition):

Iliopoulou, Ioanna. “Improving the stability of the black carrot (Daucus carota L.) colourant.” 2016. Doctoral Dissertation, University of Edinburgh. Accessed April 10, 2021. http://hdl.handle.net/1842/17975.

MLA Handbook (7^th Edition):

Iliopoulou, Ioanna. “Improving the stability of the black carrot (Daucus carota L.) colourant.” 2016. Web. 10 Apr 2021.

Vancouver:

Iliopoulou I. Improving the stability of the black carrot (Daucus carota L.) colourant. [Internet] [Doctoral dissertation]. University of Edinburgh; 2016. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/1842/17975.

Council of Science Editors:

Iliopoulou I. Improving the stability of the black carrot (Daucus carota L.) colourant. [Doctoral Dissertation]. University of Edinburgh; 2016. Available from: http://hdl.handle.net/1842/17975

University of Georgia

14. Perryman, Miriam Elaine. Microplastic generation in the marine environment through degradation and fragmentation.

Degree: 2016, University of Georgia

URL: http://hdl.handle.net/10724/34573

► Plastic use has become requisite in our global economy; as population continues to increase, so too, will plastic production. At its end-of-life, some amount of… (more)

Subjects/Keywords: Photo-oxidative degradation; thermal degradation; mechanical degradation; polypropylene; polyethylene; weathering-induced fragmentation; microfiber contamination; marine debris

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APA (6^th Edition):

Perryman, M. E. (2016). Microplastic generation in the marine environment through degradation and fragmentation. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/34573

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Perryman, Miriam Elaine. “Microplastic generation in the marine environment through degradation and fragmentation.” 2016. Thesis, University of Georgia. Accessed April 10, 2021. http://hdl.handle.net/10724/34573.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Perryman, Miriam Elaine. “Microplastic generation in the marine environment through degradation and fragmentation.” 2016. Web. 10 Apr 2021.

Vancouver:

Perryman ME. Microplastic generation in the marine environment through degradation and fragmentation. [Internet] [Thesis]. University of Georgia; 2016. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10724/34573.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Perryman ME. Microplastic generation in the marine environment through degradation and fragmentation. [Thesis]. University of Georgia; 2016. Available from: http://hdl.handle.net/10724/34573

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Kentucky

15. Huang, Quanzhen. THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE.

Degree: 2015, University of Kentucky

URL: https://uknowledge.uky.edu/chemistry_etds/51

► In the selection of candidates for CO2 absorption, solvent thermal degradation has become a general concern due to the significant impact on operational cost and… (more)

▼ In the selection of candidates for CO2 absorption, solvent thermal degradation has become a general concern due to the significant impact on operational cost and the intention to use thermal compression from high temperature stripping to minimize the overall process energy. In this research, the impact of flue gas contaminants on Monoethanolamine (MEA) thermal degradation was investigated at elevated temperatures consistent with those in the CO2 stripper. Nitrite, fly ash, sulfate and thiosulfate were each added to 5.0 M MEA and the contaminant-containing MEA solutions were degraded at 125 °C, 135 °C and 145 °C. MEA degrades significantly more in the presence of nitrite (5000 ppm) than MEA alone at the same amine molar concentration for all three temperatures. MEA degradation activation energy of MEA-nitrite solution is approximately one-seventh of that of MEA solution without nitrite. Fly ash was observed to inhibit nitrite-induced MEA degradation and greatly increase the MEA degradation activation energy of MEA-nitrite solution. Fly ash, sodium sulfate and sodium thiosulfate by themselves were not shown to impact MEA thermal degradation rate. Sodium salts of glycine, sarcosine, alanine and ß-alanine were thermally degraded at 125 °C, 135 °C and 145 °C, respectively, to discover the structural reasons for their thermal stability. These four amino acids have enhanced thermal degradation rates compared to MEA. The stability order for amino acid salts tested to date is: sarcosinate > alaninate > ß-alaninate. Calculated activation energies for the degradation processes are lower than that of MEA. ß-Alaninate (ß-Ala) thermal degradation generates ß-Ala dimer (major degradation product), ß-Ala dimer carbamate and tetrahydro-1,3-oxazin-6-one. Functional groups, amine orders and steric effect were investigated for their impact on amine thermal degradation. Primary amines with chain structures showed a thermal stability trend as diamine > alkanolamine > amino acid salt. For alknolamine and diamine structural isomers, the primary amines are more stable than the secondary amines. Steric hindrance around the amine group plays a global positive role in protecting amines against thermal degradation.

Subjects/Keywords: Thermal Degradation; Flue Gas Contaminants; Activation Energy; Thermal Compression; Steric Hindrance; Environmental Chemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Huang, Q. (2015). THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/chemistry_etds/51

Chicago Manual of Style (16^th Edition):

Huang, Quanzhen. “THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE.” 2015. Doctoral Dissertation, University of Kentucky. Accessed April 10, 2021. https://uknowledge.uky.edu/chemistry_etds/51.

MLA Handbook (7^th Edition):

Huang, Quanzhen. “THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE.” 2015. Web. 10 Apr 2021.

Vancouver:

Huang Q. THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE. [Internet] [Doctoral dissertation]. University of Kentucky; 2015. [cited 2021 Apr 10]. Available from: https://uknowledge.uky.edu/chemistry_etds/51.

Council of Science Editors:

Huang Q. THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE. [Doctoral Dissertation]. University of Kentucky; 2015. Available from: https://uknowledge.uky.edu/chemistry_etds/51

NSYSU

16. Lu, Shih-fu. Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of Propylene Succinate.

Degree: PhD, Materials and Optoelectronic Science, 2010, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0815110-102430

► Poly(butylene succinate) (PBSu) and two poly(butylene succinate-co-propylene succinate)s (PBPSu 95/5 and PBPSu 90/10) were synthesized via the direct polycondensation reaction. The copolyesters were characterized as… (more)

▼ Poly(butylene succinate) (PBSu) and two poly(butylene succinate-co-propylene succinate)s (PBPSu 95/5 and PBPSu 90/10) were synthesized via the direct polycondensation reaction. The copolyesters were characterized as having 7.0 and 11.5 mol% propylene succinate (PS) units, respectively, by 1H NMR. Copolyesters were characterized as random, based on 13C NMR spectra. They were fully investigated during nonisothermal crystallization and thermal degradation through various approaches in this study. A differential scanning calorimeter (DSC) and a polarized light microscope (PLM) adopted to study the nonisothermal crystallization of these polyesters at a cooling rate of 1, 2, 3, 5, 6 and 10 ºC/min. Morphologies and the isothermal growth rates of spherulites under PLM experiments were monitored and obtained by curve-fitting, respectively. These continuous rate data were analyzed with the Lauritzen-Hoffman equation. A transition of regime II â III was found at 95.6, 84.4, and 77.3 ºC for PBSu, PBPSu 95/5, and PBPSu 90/10, respectively. DSC exothermic curves show that all of the nonisothermal crystallization occurred in regime III. DSC data were analyzed using modified Avrami, Ozawa, Mo, Friedman and Vyazovkin equations. Ozawa equation does not accurately describe the nonisothermal crystallization kinetics of this polyester because part of the crystallization is secondary crystallization. All the results of PLM and DSC measurements indicate that incorporation of minor PS units into PBSu markedly inhibits the crystallization of the resulting polymer. The melting behavior of nonisothermally crystallized samples presents a continuous meltingârecrystallizationâremelting process. Additionally, three absorption bands during the nonisothermal crystallization were identified for PBSu and two PBPSu copolyesters, namely, 916, 955, 1045 cm-1 in the attenuated total reflectance FTIR spectra. Thermogravimetric analysis (TGA)-FTIR was heated at 5 ºC/min under N2 to monitor the degradation products of these three polyesters. FTIR spectra revealed that the major products were anhydrides, which were obtained following two cyclic intramolecular degradation mechanisms by breaking the weak O-CH2 bonds around a succinate group. Thermal stability at heating rates of 1, 3, 5, and 10 ºC/min under N2 was investigated using TGA. The model-free methods of Friedman and Ozawa equations are useful for studying the activation energy of degradation in each period of mass loss. The results reveal that the random incorporation of minor PS units into PBSu did not markedly affect their thermal resistance. Two model-fitting mechanisms were used to determine the loss mass function f(Î±), the activation energy and the associated mechanism. The mechanism of autocatalysis nth-order, with f(Î±)=Î±m(1-Î±)n, fitted the experimental data much more closely than did the nth-order mechanism given by f(Î±)=(1-Î±)n. The obtained activation energy was used to estimate the failure temperature (Tf). The values of Tf for a mass loss of 5% and an endurance time of 60,000 hr are… Advisors/Committee Members: Ming Chen (committee member), Chi Wang (chair), Chang-mou Wu (chair), Tzong-ming Wu (chair), Fang-chyou Chiu (chair), An-chung Su (chair).

Subjects/Keywords: copolyesters; thermal degradation; poly(butylene succinate); nonisothermal crystallization

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APA (6^th Edition):

Lu, S. (2010). Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of Propylene Succinate. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0815110-102430

Chicago Manual of Style (16^th Edition):

Lu, Shih-fu. “Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of Propylene Succinate.” 2010. Doctoral Dissertation, NSYSU. Accessed April 10, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0815110-102430.

MLA Handbook (7^th Edition):

Lu, Shih-fu. “Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of Propylene Succinate.” 2010. Web. 10 Apr 2021.

Vancouver:

Lu S. Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of Propylene Succinate. [Internet] [Doctoral dissertation]. NSYSU; 2010. [cited 2021 Apr 10]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0815110-102430.

Council of Science Editors:

Lu S. Nonisothermal Crystallization and Thermal Degradation Behaviors of Poly(butylene succinate) and its Copolyesters with Minor Amounts of Propylene Succinate. [Doctoral Dissertation]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0815110-102430

NSYSU

17. Wang, Jian-Ren. Crystallization and Thermal Degradation Behaviors of Poly(ethylene naphthalate).

Degree: Master, Materials and Optoelectronic Science, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0608114-134204

► In this study, the crystallization and thermal degradation behaviors of poly(ethylene naphthalate) (PEN) were investigated using different instruments. This study contains three parts. In the… (more)

▼ In this study, the crystallization and thermal degradation behaviors of poly(ethylene naphthalate) (PEN) were investigated using different instruments. This study contains three parts. In the first part, isothermal crystallization experiments were performed from 190 to 250Â°C by differential scanning calorimeter (DSC). The crystallization kinetics was analyzed via Avrami equation. The micrographs obtained from polarized light microscope (PLM) showed that Î±-form crystals were banded spherulites with negative birefringence and Î²-form crystals were fribril spherulites with positive birefringence. The maximum growth rate was 1.29Ã10-2 Î¼m/sec at 210Â°C. Wide angle X-ray diffraction (WAXD) patterns display ï¡-form when crystallized below 226Â°C and Î²-form formed above 227Â°C. The melting behavior after isothermal crystallization was investigated by DSC. ï¡-form crystals presented melting-recrystallization-remelting behavior and Î²-form crystals showed dual morphology. Equilibrium melting temperatures were obtained by Hoffman-Weeks linear plots: ï¡-form gave 286.2Â°C, and Î²-form yielded 295.5Â°C. The second part focused on the non-isothermal crystallization of PEN. DSC was conducted at a cooling rate of 0.1, 0.5, 1, 3, or 5Â°C/min. Nonisothermal crystallization kinetics of Î±- and Î²-form crystals were analyzed and compared using modified Avrami, Ozawa, and Mo equations. PLM was performed at a cooling rate of 3Â°C/min that lasted 40 min. Continuously isothermal growth rates of crystals were obtained with a non-bell shape. This non-bell curve was deconvoluted into two curves that correspond to the growth rates of Î±- and Î²-form crystals, separately. Regime analysis was then applied to these two curves. TIIâIII was found around 228Â°C for Î±-form crystals and 246Â°C for Î²-form crystals. Kissinger equation was used to evaluate the effective activation energy. The value was 127.8 kJ/mol for ï¡-form crystal and 220.9 kJ/mol for Î²-form crystal. The third part was to study the thermal stability of PEN under nitrogen at heating rates of 1, 3, 5, and 10Â°C/min via thermogravimetric analyzer (TGA). The model-free methods of Friedman and Ozawa equations were adopted to evaluate the activation energy of thermal degradation in each period of mass loss. The average activation energy, 194 kJ/mol, was then used to fit the mass loss using the nth-order and autocatalysis nth-order model-fitting mechanisms. Additionally, TGA-FTIR under nitrogen was used to monitor the thermal degradation products of PEN at 5ÂºC/min. FTIR spectra revealed that the major gas products had CO2 and aldehydes, and Î²- hydrogen scission occurred before Î±-hydrogen bond scission. Thermal degradation products may contain ethanedial, 2-naphthaldehyde, ethenone, 2,6-naphthalene dicarboxaldehyde and 2,6-naphthalene dicarboxylic acid. Advisors/Committee Members: Shiao-Wei Kuo (chair), Ming Chen (committee member), Shih-Fu Lu (chair), Yeo-Wan Chiang (chair).

Subjects/Keywords: crystallization; morphology; thermal degradation; melting; growth rate; poly(ethylene naphthalate)

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APA (6^th Edition):

Wang, J. (2014). Crystallization and Thermal Degradation Behaviors of Poly(ethylene naphthalate). (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0608114-134204

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Jian-Ren. “Crystallization and Thermal Degradation Behaviors of Poly(ethylene naphthalate).” 2014. Thesis, NSYSU. Accessed April 10, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0608114-134204.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Jian-Ren. “Crystallization and Thermal Degradation Behaviors of Poly(ethylene naphthalate).” 2014. Web. 10 Apr 2021.

Vancouver:

Wang J. Crystallization and Thermal Degradation Behaviors of Poly(ethylene naphthalate). [Internet] [Thesis]. NSYSU; 2014. [cited 2021 Apr 10]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0608114-134204.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang J. Crystallization and Thermal Degradation Behaviors of Poly(ethylene naphthalate). [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0608114-134204

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology

18. Lee, David W. Thermal degradation of polymer blends containing poly(vinyl chloride).

Degree: School of Chemistry and Materials Science (COS), 1987, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/5994

► The thermal degradation of blends of poly(vinyl chloride) ( PVC ) with poly(vinyl acetate) (PVA), and two ethylene-vinyl acetate copolymers containing 70 weight percent vinyl-acetate… (more)

Subjects/Keywords: Polymers; Thermal degradation; Polyvinyl chloride

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APA (6^th Edition):

Lee, D. W. (1987). Thermal degradation of polymer blends containing poly(vinyl chloride). (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/5994

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lee, David W. “Thermal degradation of polymer blends containing poly(vinyl chloride).” 1987. Thesis, Rochester Institute of Technology. Accessed April 10, 2021. https://scholarworks.rit.edu/theses/5994.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, David W. “Thermal degradation of polymer blends containing poly(vinyl chloride).” 1987. Web. 10 Apr 2021.

Vancouver:

Lee DW. Thermal degradation of polymer blends containing poly(vinyl chloride). [Internet] [Thesis]. Rochester Institute of Technology; 1987. [cited 2021 Apr 10]. Available from: https://scholarworks.rit.edu/theses/5994.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee DW. Thermal degradation of polymer blends containing poly(vinyl chloride). [Thesis]. Rochester Institute of Technology; 1987. Available from: https://scholarworks.rit.edu/theses/5994

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology

19. Formosa, Joseph S. Thermal degradation of polymer blends containing the poly(hydryoxy ether of Bisphenol-A).

Degree: School of Chemistry and Materials Science (COS), 1987, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/5995

► The thermal degradation of blends of phenoxy with polycaprolactone , poly ( 1 , 4-butylene adipate), poly(l,4-cyclohexane-dimethylene succinate), poly( 2 , 2-dimethyl-l , 3-propylene succinate),… (more)

Subjects/Keywords: Polyesters; Thermal degradation; Polymers

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APA (6^th Edition):

Formosa, J. S. (1987). Thermal degradation of polymer blends containing the poly(hydryoxy ether of Bisphenol-A). (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/5995

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Formosa, Joseph S. “Thermal degradation of polymer blends containing the poly(hydryoxy ether of Bisphenol-A).” 1987. Thesis, Rochester Institute of Technology. Accessed April 10, 2021. https://scholarworks.rit.edu/theses/5995.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Formosa, Joseph S. “Thermal degradation of polymer blends containing the poly(hydryoxy ether of Bisphenol-A).” 1987. Web. 10 Apr 2021.

Vancouver:

Formosa JS. Thermal degradation of polymer blends containing the poly(hydryoxy ether of Bisphenol-A). [Internet] [Thesis]. Rochester Institute of Technology; 1987. [cited 2021 Apr 10]. Available from: https://scholarworks.rit.edu/theses/5995.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Formosa JS. Thermal degradation of polymer blends containing the poly(hydryoxy ether of Bisphenol-A). [Thesis]. Rochester Institute of Technology; 1987. Available from: https://scholarworks.rit.edu/theses/5995

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Connecticut

20. Wentworth, Adam J. Thermal Analysis and Cation Doping of Nafion Membranes.

Degree: MS, Materials Science and Engineering, 2011, University of Connecticut

URL: https://opencommons.uconn.edu/gs_theses/146

► Cationic contamination degrades polymer electrolyte membrane fuel cell (PEMFC) performance by decreasing proton conductivity and water content in perfluorosulfonic membranes such as Nafion. Hydration… (more)

Subjects/Keywords: Nafion; cation; thermal stability; sodium; TGA; DSC; FTIR; PEMFC; membrane; degradation

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APA (6^th Edition):

Wentworth, A. J. (2011). Thermal Analysis and Cation Doping of Nafion Membranes. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/146

Chicago Manual of Style (16^th Edition):

Wentworth, Adam J. “Thermal Analysis and Cation Doping of Nafion Membranes.” 2011. Masters Thesis, University of Connecticut. Accessed April 10, 2021. https://opencommons.uconn.edu/gs_theses/146.

MLA Handbook (7^th Edition):

Wentworth, Adam J. “Thermal Analysis and Cation Doping of Nafion Membranes.” 2011. Web. 10 Apr 2021.

Vancouver:

Wentworth AJ. Thermal Analysis and Cation Doping of Nafion Membranes. [Internet] [Masters thesis]. University of Connecticut; 2011. [cited 2021 Apr 10]. Available from: https://opencommons.uconn.edu/gs_theses/146.

Council of Science Editors:

Wentworth AJ. Thermal Analysis and Cation Doping of Nafion Membranes. [Masters Thesis]. University of Connecticut; 2011. Available from: https://opencommons.uconn.edu/gs_theses/146

University of Oxford

21. Sharer Sahir, Zalilah. Investigation of protective mechanisms of organic coatings by thermal testing and electrochemical techniques.

Degree: PhD, 2011, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:8fb242d3-4836-4082-ae95-b7990b593f8a ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543547

► This work investigated the protection of mechanism of organic coatings on steel exposed to 3% sodium chloride solution at 50°C, coupled with the use of… (more)

Subjects/Keywords: 669; Materials Sciences; Organic Coating; Electrochemical Techniques; Thermal Testing; Coating Degradation

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APA (6^th Edition):

Sharer Sahir, Z. (2011). Investigation of protective mechanisms of organic coatings by thermal testing and electrochemical techniques. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:8fb242d3-4836-4082-ae95-b7990b593f8a ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543547

Chicago Manual of Style (16^th Edition):

Sharer Sahir, Zalilah. “Investigation of protective mechanisms of organic coatings by thermal testing and electrochemical techniques.” 2011. Doctoral Dissertation, University of Oxford. Accessed April 10, 2021. http://ora.ox.ac.uk/objects/uuid:8fb242d3-4836-4082-ae95-b7990b593f8a ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543547.

MLA Handbook (7^th Edition):

Sharer Sahir, Zalilah. “Investigation of protective mechanisms of organic coatings by thermal testing and electrochemical techniques.” 2011. Web. 10 Apr 2021.

Vancouver:

Sharer Sahir Z. Investigation of protective mechanisms of organic coatings by thermal testing and electrochemical techniques. [Internet] [Doctoral dissertation]. University of Oxford; 2011. [cited 2021 Apr 10]. Available from: http://ora.ox.ac.uk/objects/uuid:8fb242d3-4836-4082-ae95-b7990b593f8a ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543547.

Council of Science Editors:

Sharer Sahir Z. Investigation of protective mechanisms of organic coatings by thermal testing and electrochemical techniques. [Doctoral Dissertation]. University of Oxford; 2011. Available from: http://ora.ox.ac.uk/objects/uuid:8fb242d3-4836-4082-ae95-b7990b593f8a ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543547

Delft University of Technology

22. van der Ree, M. (author). The Degradation of Carbon Fibre-Reinforced Epoxy Composites under Fusion Bonding Conditions.

Degree: 2016, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:e9680a79-e62e-47d6-9637-f45c5ef4ecc3

►

In the aircraft industry there is an increasing need for cost-effective assembly methods for dissimilar thermoplastic/thermosetting composites. Fusion bonding provides a good alternative to mechanical… (more)

Subjects/Keywords: thermal degradation; thermoset; composite; resistance welding; fusion bonding

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APA (6^th Edition):

van der Ree, M. (. (2016). The Degradation of Carbon Fibre-Reinforced Epoxy Composites under Fusion Bonding Conditions. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e9680a79-e62e-47d6-9637-f45c5ef4ecc3

Chicago Manual of Style (16^th Edition):

van der Ree, M (author). “The Degradation of Carbon Fibre-Reinforced Epoxy Composites under Fusion Bonding Conditions.” 2016. Masters Thesis, Delft University of Technology. Accessed April 10, 2021. http://resolver.tudelft.nl/uuid:e9680a79-e62e-47d6-9637-f45c5ef4ecc3.

MLA Handbook (7^th Edition):

van der Ree, M (author). “The Degradation of Carbon Fibre-Reinforced Epoxy Composites under Fusion Bonding Conditions.” 2016. Web. 10 Apr 2021.

Vancouver:

van der Ree M(. The Degradation of Carbon Fibre-Reinforced Epoxy Composites under Fusion Bonding Conditions. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Apr 10]. Available from: http://resolver.tudelft.nl/uuid:e9680a79-e62e-47d6-9637-f45c5ef4ecc3.

Council of Science Editors:

van der Ree M(. The Degradation of Carbon Fibre-Reinforced Epoxy Composites under Fusion Bonding Conditions. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:e9680a79-e62e-47d6-9637-f45c5ef4ecc3

University of Western Ontario

23. Langford, Joelle E. Modelling the thermal transport of a thawing permafrost plateau.

Degree: 2018, University of Western Ontario

URL: https://ir.lib.uwo.ca/etd/5397

► Permafrost covers approximately 24% of the Northern Hemisphere and is in a state of decay which has large implications. To characterize the processes involved in… (more)

Subjects/Keywords: permafrost aggradation; permafrost degradation; thermal transport; wetland hydrogeology; Geology; Hydrology

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APA (6^th Edition):

Langford, J. E. (2018). Modelling the thermal transport of a thawing permafrost plateau. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/5397

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Langford, Joelle E. “Modelling the thermal transport of a thawing permafrost plateau.” 2018. Thesis, University of Western Ontario. Accessed April 10, 2021. https://ir.lib.uwo.ca/etd/5397.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Langford, Joelle E. “Modelling the thermal transport of a thawing permafrost plateau.” 2018. Web. 10 Apr 2021.

Vancouver:

Langford JE. Modelling the thermal transport of a thawing permafrost plateau. [Internet] [Thesis]. University of Western Ontario; 2018. [cited 2021 Apr 10]. Available from: https://ir.lib.uwo.ca/etd/5397.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Langford JE. Modelling the thermal transport of a thawing permafrost plateau. [Thesis]. University of Western Ontario; 2018. Available from: https://ir.lib.uwo.ca/etd/5397

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

24. He, Jing. Physicochemical characterisation of organic materials of interest for astrobiology : Titan's aerosols analogues : Caractérisation physico-chimique de matériaux organique d’intérêt exobiologique : application aux aérosols analogues de Titan.

Degree: Docteur es, Chimie analytique, 2013, Châtenay-Malabry, Ecole centrale de Paris

URL: http://www.theses.fr/2013ECAP0054

►

Depuis l’obtention des premiers résultats de la mission Cassini Huygens, les aérosols de Titan présentent un intérêt astrobiologique car leur caractérisation permet d'évaluer la chimie… (more)

▼

Depuis l’obtention des premiers résultats de la mission Cassini Huygens, les aérosols de Titan présentent un intérêt astrobiologique car leur caractérisation permet d'évaluer la chimie prébiotique qui a eu lieu sur la Terre primitive. Mieux comprendre les propriétés physico-chimiques des aérosols de Titan est important pour les scientifiques. Le laboratoire via l'analyse des propriétés des tholins (l'analogue des aérosols de Titan) permet de surmonter les difficultés d’analyser les aérosols de Titan directement. Dans ce travail de thèse, l'objet de la recherche est l’analyse des tholins produits par l’expérience PAMPRE. La technique d’analyse Pyr-GC-MS a été utilisée pour caractériser la composition et la structure de tholins. La stabilité thermique et le changement des propriétés en fonction de la température ont été réalisés par l'étude de la dégradation thermique. Enfin, l'évolution des aérosols organiques après leur précipitation sur la surface de Titan a également été étudiée selon la méthode GC-MS d’analyse des tholins. Les résultats obtenus peuvent être utilisés pour interpréter les données recueillies par des observations de Titan de la terre ou par la sonde Cassini-Huygens, afin de mieux caractériser le satellite et son évolution.

Since the achievement of the first results from the Cassini Huygens mission, Titan’s aerosols present an astrobiological interest as their characterization enables to evaluate the prebiotic chemistry that occurred on the primitive Earth. To better understand the physical chemistry of the aerosols of Titan is important for scientists. The laboratory via analyzing the properties of tholins (analogues of Titan’s aerosols) overcomes the difficulties for analyzing Titan’s aerosols directly. In this thesis work, the research object is tholins produced by the PAMPRE experiment. Pyr-GC-MS analysis technique was used to characterize the composition and structure of tholins. The thermal stability and the properties change with the temperature have been realized by thermal degradation study. Finally, the evolution of organic aerosols after precipitation on the surface of Titan was also investigated through GC-MS analysis of tholins. The results obtained can be used to interpret data collected by observations of Titan from Earth or by the Cassini-Huygens probe, to better characterize the satellite and its evolution.

Advisors/Committee Members: Buch, Arnaud (thesis director).

Subjects/Keywords: Titan; Tholins; Dégradation thermique; Titan; Tholins; Thermal degradation

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APA (6^th Edition):

He, J. (2013). Physicochemical characterisation of organic materials of interest for astrobiology : Titan's aerosols analogues : Caractérisation physico-chimique de matériaux organique d’intérêt exobiologique : application aux aérosols analogues de Titan. (Doctoral Dissertation). Châtenay-Malabry, Ecole centrale de Paris. Retrieved from http://www.theses.fr/2013ECAP0054

Chicago Manual of Style (16^th Edition):

He, Jing. “Physicochemical characterisation of organic materials of interest for astrobiology : Titan's aerosols analogues : Caractérisation physico-chimique de matériaux organique d’intérêt exobiologique : application aux aérosols analogues de Titan.” 2013. Doctoral Dissertation, Châtenay-Malabry, Ecole centrale de Paris. Accessed April 10, 2021. http://www.theses.fr/2013ECAP0054.

MLA Handbook (7^th Edition):

He, Jing. “Physicochemical characterisation of organic materials of interest for astrobiology : Titan's aerosols analogues : Caractérisation physico-chimique de matériaux organique d’intérêt exobiologique : application aux aérosols analogues de Titan.” 2013. Web. 10 Apr 2021.

Vancouver:

He J. Physicochemical characterisation of organic materials of interest for astrobiology : Titan's aerosols analogues : Caractérisation physico-chimique de matériaux organique d’intérêt exobiologique : application aux aérosols analogues de Titan. [Internet] [Doctoral dissertation]. Châtenay-Malabry, Ecole centrale de Paris; 2013. [cited 2021 Apr 10]. Available from: http://www.theses.fr/2013ECAP0054.

Council of Science Editors:

He J. Physicochemical characterisation of organic materials of interest for astrobiology : Titan's aerosols analogues : Caractérisation physico-chimique de matériaux organique d’intérêt exobiologique : application aux aérosols analogues de Titan. [Doctoral Dissertation]. Châtenay-Malabry, Ecole centrale de Paris; 2013. Available from: http://www.theses.fr/2013ECAP0054

Georgia Tech

25. Costanza, Jed. Degradation of Tetrachloroethylene and Trichloroethylene under Thermal Remediation Conditions.

Degree: PhD, Civil and Environmental Engineering, 2005, Georgia Tech

URL: http://hdl.handle.net/1853/7485

► Thermal remediation involves heating subsurface environments and collecting fluids in order to recover contaminants such as tetrachloroethylene (PCE) and trichloroethylene (TCE). While increasing subsurface temperature… (more)

▼ Thermal remediation involves heating subsurface environments and collecting fluids in order to recover contaminants such as tetrachloroethylene (PCE) and trichloroethylene (TCE). While increasing subsurface temperature can lead to changes in the distribution of contaminants between the solid, liquid, and gas phases, there is also an increased potential for PCE and TCE to degrade. This work was performed to determine the rate of PCE and TCE degradation and products formed in laboratory-scale experiments designed to simulate thermal remediation conditions. The conditions during transport of gas-phase TCE were simulated using flow-through experiments in the temperature range from 60 to 800C. Degradation of TCE was not evident at temperatures of less than 240C; however, chloroacetic acids, which comprised less than 0.1% of the influent TCE on a carbon basis, were detected. At temperatures greater than 300C, TCE readily degraded where the identities of the degradation products were a function of oxygen and water content. With oxygen present, TCE degraded to form CO, phosgene, CO2 with minor amounts of hexachloroethane, PCE, and carbon tetrachloride. Increasing the amount of water vapor was found to decrease the amount of TCE degraded. Vapor recovery systems used during thermal treatments are anticipated to capture these TCE degradation products. However, the amount of missing carbon (~17%) in experiments completed at 800C makes the prospect of recovering all TCE degradation products doubtful. Experiments were conducted using hermetically sealed ampules to simulate heating dissolved phase PCE and TCE over periods of up to 75 days. At 120C, the first-order TCE degradation half-life was 330 days and the degradation products included CO and CO2, glycolate, formate, and chloride. The rate of TCE disappearance was increased with the addition of 1% (wt.) goethite, which suggests that the presence of iron bearing soil minerals can increase rates of TCE degradation during thermal treatment. In contaminated field samples, TCE was found to degrade to form cis-1,2-dichloroethylene at 95C coincident with the formation of hydrogen gas. Degradation of PCE was not evident in field samples or in deionized water and is not expected to degrade during thermal remediation at temperatures below 95C. Advisors/Committee Members: Pennell, Kurt (Committee Chair), carolyn ruppel (Committee Member), D. Webster (Committee Member), James Mulholland (Committee Member), Lawrence Bottomley (Committee Member).

Subjects/Keywords: Thermal; Trichloroethylene; Tetrachloroethylene; Degradation

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APA (6^th Edition):

Costanza, J. (2005). Degradation of Tetrachloroethylene and Trichloroethylene under Thermal Remediation Conditions. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/7485

Chicago Manual of Style (16^th Edition):

Costanza, Jed. “Degradation of Tetrachloroethylene and Trichloroethylene under Thermal Remediation Conditions.” 2005. Doctoral Dissertation, Georgia Tech. Accessed April 10, 2021. http://hdl.handle.net/1853/7485.

MLA Handbook (7^th Edition):

Costanza, Jed. “Degradation of Tetrachloroethylene and Trichloroethylene under Thermal Remediation Conditions.” 2005. Web. 10 Apr 2021.

Vancouver:

Costanza J. Degradation of Tetrachloroethylene and Trichloroethylene under Thermal Remediation Conditions. [Internet] [Doctoral dissertation]. Georgia Tech; 2005. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/1853/7485.

Council of Science Editors:

Costanza J. Degradation of Tetrachloroethylene and Trichloroethylene under Thermal Remediation Conditions. [Doctoral Dissertation]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/7485

University of Waterloo

26. Didomizio, Matthew. Experimental Study of Thermal Degradation of Fire Resisting Compartment Partitions in Fires.

Degree: 2017, University of Waterloo

URL: http://hdl.handle.net/10012/12228

► Fire separations in a building (e.g. walls) are often constructed from combustible materials; those containing wood stud framing, mineral wool insulation, and gypsum board wallcoverings… (more)

▼ Fire separations in a building (e.g. walls) are often constructed from combustible materials; those containing wood stud framing, mineral wool insulation, and gypsum board wallcoverings are commonplace in Canadian residential buildings. These construction assemblies degrade under fire exposure, a process involving chemical decomposition as well as physical damage. A fire separation's ability to resist the spread of fire is traditionally assessed by means of a fire resistance test, in which a construction assembly is exposed to an intense furnace fire under prescribed conditions. This method of assessment, while standardized and prescribed in the National Building Code of Canada, can be restrictive to the design process. In contrast, a performance-based approach, in which the adequacy of a fire separation is assessed on the basis of its real-world use, can lead to designs with improved safety, efficiency, and flexibility. Such a design approach requires a specific engineering toolset: models capable of predicting the thermal degradation of construction assemblies under specified fire conditions. Development of the next generation of thermal degradation models requires detailed study of the phenomena occurring at the large-scale, in the context of real fires rather than prescribed exposure conditions, and a controlled means by which to conduct this type of study. Also, a diverse set of experimental data is required for the validation of such models. The objective of the present body of work is to develop a novel large-scale experiment tailored specifically for the study of thermal degradation of construction assemblies in real fires, and to demonstrate the utility of the experimental procedure as applied to the detailed study of thermal degradation phenomena. A selection of relevant experimental techniques were identified, and a new apparatus and method of test were developed for this stated purpose. In this new experiment, one wall of a fire compartment was instrumented and monitored as it was subject to a realistic fire exposure. A novel method for measurement of incident heat flux to a large area in a fire compartment was developed, and used to characterize the conditions of the experiment for a wood crib fire. A series tests were conducted on fire resisting compartment partitions that are used in residential buildings in Canada. In the tests, thermal degradation phenomena were observed and assessed relative to temperatures measured in the degrading walls. The utility of this new approach in the experimental study of thermal degradation of construction assemblies subject to real fire exposures was demonstrated. Furthermore, a relevant set of experimental data was generated that may be used for validation of future models of thermal degradation and integrated fire analysis.

Subjects/Keywords: compartment fires; kalman filter; experimental; fire resistance; thermal degradation

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APA (6^th Edition):

Didomizio, M. (2017). Experimental Study of Thermal Degradation of Fire Resisting Compartment Partitions in Fires. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/12228

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Didomizio, Matthew. “Experimental Study of Thermal Degradation of Fire Resisting Compartment Partitions in Fires.” 2017. Thesis, University of Waterloo. Accessed April 10, 2021. http://hdl.handle.net/10012/12228.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Didomizio, Matthew. “Experimental Study of Thermal Degradation of Fire Resisting Compartment Partitions in Fires.” 2017. Web. 10 Apr 2021.

Vancouver:

Didomizio M. Experimental Study of Thermal Degradation of Fire Resisting Compartment Partitions in Fires. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10012/12228.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Didomizio M. Experimental Study of Thermal Degradation of Fire Resisting Compartment Partitions in Fires. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/12228

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Louisiana State University

27. Nganai, Shadrack Kirwa. Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz.

Degree: PhD, Chemistry, 2010, Louisiana State University

URL: etd-09182010-105119 ; https://digitalcommons.lsu.edu/gradschool_dissertations/381

► Formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) which occurs inexorably from most thermal and combustion processes constitutes a major toxic component of environmental pollutants. Generally,… (more)

▼ Formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) which occurs inexorably from most thermal and combustion processes constitutes a major toxic component of environmental pollutants. Generally, it is well established that transition metal-mediated reactions account for the majority of PCDD/F emissions from combustion sources. Specifically, both copper and iron ions, which occur abundantly in combustion generated particulate matter, are considered probably the most active in promoting PCDD/F formation typically in the low temperature post-combustion zone and flue gas pollution control devices. It has also been demonstrated that chlorinated phenols are key intermediates in essentially all pathways of PCDD/F formation. Chlorinated benzenes have been presumed to be potent precursors that form PCDD/Fs and are among the most abundant aromatic compounds in incinerator exhaust. Notably, numerous studies have been reported in regard to surface-mediated processes of PCDD/F formation via de novo synthesis and transition metal-mediated processes from reactions of chlorinated phenols. However, few experimental studies have been conducted on chlorinated benzenes. In addition, even though iron oxide is present at 2-50 times higher concentrations than copper oxide, virtually no studies of the iron oxide mediated formation of PCDD/Fs have been reported in the literature. For this study, PCDD/F formation over iron oxide and copper oxide surfaces were investigated using the reactants 2-MCP and 1,2-DCBz in pure and mixture form. The surface-mediated reactions were studied under pyrolytic and oxidative conditions over a temperature range of 200 to 550 °C. For the entire study, simplified model surfaces of 5% copper (II) oxide on silica and 5% iron (III) oxide on silica were used in order to facilitate comparison with previous data from similar experiments performed with pure samples of 2-MCP and 1,2-DCBz. Precursor 2-MCP is useful as a model chlorinated phenol, while 1,2-DCBz was selected because it has been found to be present in high concentration in relation to other congeners of polychlorinated benzenes in combustion exhaust and is nearly isoeletronic with 2-MCP, that provides a basis for comparison of product distributions and yields. Reaction pathways of PCDD/F products as well as the intermediates involved are comprehensively analyzed and discussed.

Subjects/Keywords: PCDD/Fs; Thermal Degradation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nganai, S. K. (2010). Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-09182010-105119 ; https://digitalcommons.lsu.edu/gradschool_dissertations/381

Chicago Manual of Style (16^th Edition):

Nganai, Shadrack Kirwa. “Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz.” 2010. Doctoral Dissertation, Louisiana State University. Accessed April 10, 2021. etd-09182010-105119 ; https://digitalcommons.lsu.edu/gradschool_dissertations/381.

MLA Handbook (7^th Edition):

Nganai, Shadrack Kirwa. “Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz.” 2010. Web. 10 Apr 2021.

Vancouver:

Nganai SK. Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz. [Internet] [Doctoral dissertation]. Louisiana State University; 2010. [cited 2021 Apr 10]. Available from: etd-09182010-105119 ; https://digitalcommons.lsu.edu/gradschool_dissertations/381.

Council of Science Editors:

Nganai SK. Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz. [Doctoral Dissertation]. Louisiana State University; 2010. Available from: etd-09182010-105119 ; https://digitalcommons.lsu.edu/gradschool_dissertations/381

28. Gausin, Christine M. Improved Thermal Stability of Cesium-Doped Perovskite Films With PMMA for Solar Cell Application.

Degree: MS, Electrical/Computer Engineering, 2018, Old Dominion University

URL: 9780438022072 ; https://digitalcommons.odu.edu/ece_etds/32

► Perovskite solar cells (PSCs) have the potential to replace the traditional silicon solar cells for commercialization applications. Perovskites offer a lower cost to fabrication,… (more)

Subjects/Keywords: Cesium; Degradation; Pbl2; Perovskite; PMMA; Thermal stability; Electrical and Computer Engineering

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APA (6^th Edition):

Gausin, C. M. (2018). Improved Thermal Stability of Cesium-Doped Perovskite Films With PMMA for Solar Cell Application. (Thesis). Old Dominion University. Retrieved from 9780438022072 ; https://digitalcommons.odu.edu/ece_etds/32

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gausin, Christine M. “Improved Thermal Stability of Cesium-Doped Perovskite Films With PMMA for Solar Cell Application.” 2018. Thesis, Old Dominion University. Accessed April 10, 2021. 9780438022072 ; https://digitalcommons.odu.edu/ece_etds/32.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gausin, Christine M. “Improved Thermal Stability of Cesium-Doped Perovskite Films With PMMA for Solar Cell Application.” 2018. Web. 10 Apr 2021.

Vancouver:

Gausin CM. Improved Thermal Stability of Cesium-Doped Perovskite Films With PMMA for Solar Cell Application. [Internet] [Thesis]. Old Dominion University; 2018. [cited 2021 Apr 10]. Available from: 9780438022072 ; https://digitalcommons.odu.edu/ece_etds/32.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gausin CM. Improved Thermal Stability of Cesium-Doped Perovskite Films With PMMA for Solar Cell Application. [Thesis]. Old Dominion University; 2018. Available from: 9780438022072 ; https://digitalcommons.odu.edu/ece_etds/32

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Iowa State University

29. Sriraman, Aishwarya. Thermal aging studies and lifetime prediction of commercial filled Ethylene Propylene Rubber (EPR) cable insulation.

Degree: 2020, Iowa State University

URL: https://lib.dr.iastate.edu/etd/18408

► There are over 600 miles of power cable installed in a typical nuclear power plant. Degradation due to thermal and radiation damage of cable insulation… (more)

Subjects/Keywords: Chlorinated Polyethylene; Ethylene Propylene Rubber; Lifetime Prediction; Thermal Degradation

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APA (6^th Edition):

Sriraman, A. (2020). Thermal aging studies and lifetime prediction of commercial filled Ethylene Propylene Rubber (EPR) cable insulation. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/18408

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sriraman, Aishwarya. “Thermal aging studies and lifetime prediction of commercial filled Ethylene Propylene Rubber (EPR) cable insulation.” 2020. Thesis, Iowa State University. Accessed April 10, 2021. https://lib.dr.iastate.edu/etd/18408.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sriraman, Aishwarya. “Thermal aging studies and lifetime prediction of commercial filled Ethylene Propylene Rubber (EPR) cable insulation.” 2020. Web. 10 Apr 2021.

Vancouver:

Sriraman A. Thermal aging studies and lifetime prediction of commercial filled Ethylene Propylene Rubber (EPR) cable insulation. [Internet] [Thesis]. Iowa State University; 2020. [cited 2021 Apr 10]. Available from: https://lib.dr.iastate.edu/etd/18408.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sriraman A. Thermal aging studies and lifetime prediction of commercial filled Ethylene Propylene Rubber (EPR) cable insulation. [Thesis]. Iowa State University; 2020. Available from: https://lib.dr.iastate.edu/etd/18408

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Univerzitet u Beogradu

30. Šumar-Ristović, Maja, 1971-. Termička stabilnost, mehanizam i kinetika razgradnje kompleksa kobalta(II), cinka(II) i kadijuma(II) sa N-benziloksikarbonilglicinom.

Degree: Hemijski fakultet, 2014, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:6704/bdef:Content/get

►

Hemija-Neorganska hemija / Chemistry-Inorganic chemistry

Termičko ponašanje kompleksa Co(II), Cd(II) i Zn(II) sa N-benziloksikarbonil- -glicinato ligandom: [Co(N-Boc-gly)2(H2O)4]·2H2O, [Cd(N-Boc-gly)2(H2O)2] i [Zn(N-Boc-gly)2] ispitivano je korišćenjem TG, DSC,… (more)

▼

Hemija-Neorganska hemija / Chemistry-Inorganic chemistry

Termičko ponašanje kompleksa Co(II), Cd(II) i Zn(II) sa N-benziloksikarbonil- -glicinato ligandom: [Co(N-Boc-gly)2(H2O)4]·2H2O, [Cd(N-Boc-gly)2(H2O)2] i [Zn(N-Boc-gly)2] ispitivano je korišćenjem TG, DSC, DTA i DTG krivih dobijenih na različitim brzinama zagrevanja (od 2,5 do 30 °C min–1), u intervalu temperatura od 25 °C do 900 °C. Određeni su mehanizam degradacije kompleksa, entalpije procesa degradacije i termodinamički aktivacioni parametri. Dobijeni rezultati pokazali su da je termička stabilnost ispitivanih kompleksa u korelaciji sa njihovom strukturom. Prisustvo ili odsustvo nekoordinovane i koordinovane vode povezuje strukturu i termičku stabilnost. Razgradnja sva tri kompleksa je stupnjevit proces, a mehanizam je isti za sve komplekse. Razgradnja kompleksa odvija se u tri dobro odvojena i definisana stupnja. Proces razgradnje podrazumeva uklanjanje molekula vode u prvom stupnju (u slučaju kompleksa koji sadrže vodu). Posle dehidratacije dolazi do postepene razgradnje dehidratisanog kompleksa. Kinetika složenih stupnjeva termičke razgradnje kompleksa Co(II), Cd(II) i Zn(II) sa N-benziloksikarbonilglicinato ligandom, ispitivana je u neizotermskim uslovima korišćenjem izokonverzionih i neizokonverzionih metoda. Zavisnost Areniusovih parametara od stepena konverzije pokazala je da su svi stupnjevi razgradnje, osim dehidratacije kompleksa Cd(II), složeni procesi koji uključuju više od jednog elementarnog stupnja. Rezultati dobijeni za složene procese analizirani su Vjazovkinovim algoritmom i određeni su invarijantni kinetički parametri. Određen je kinetički triplet (energija aktivacije, predeksponencijalni factor i kinetički model) za elementarni proces dehidratacije kompleksa Cd(II): Einv = 170,4±6,4 kJ mol–1 i Zinv = 2,6∙1023. Ustanovljeni kinetički model, „D3”, potvrđen je kriterijumima definisanim Malekovom, Perez-Makeda i Master-plot metodom. Složeni procesi: dehidratacija Co(II)-kompleksa, prvi stupanj razlaganja dehidratisanog Co(II)- i Cd(II)-kompleksa i prvi stupanj razgradnje Zn(II)-kompleksa, razdvojeni su na elementarne procese, korišćenjem vektorskog proizvoda Gausijan i Lorencijan funkcije. U cilju dobijanja reakcionih modela primenjene su Malekova i Šestak-Bergrenova metoda. Reakcioni modeli su potvrđeni Master plot metodom. Ove metode su pokazale da je reakcioni model za sve elementarne stupnjeve Šestak-Bergrenov model, M(1-N), sa različitim M i N kinetičkim parametrima.

Advisors/Committee Members: Anđelković, Katarina, 1957-.

Subjects/Keywords: N-benzyloxycarbonylglycine; d metal complexes; Thermal analysis; Thermal stability; Mechanism of thermal degradation; Kinetics; Deconvolution of complex processes

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APA (6^th Edition):

Šumar-Ristović, Maja, 1. (2014). Termička stabilnost, mehanizam i kinetika razgradnje kompleksa kobalta(II), cinka(II) i kadijuma(II) sa N-benziloksikarbonilglicinom. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:6704/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Šumar-Ristović, Maja, 1971-. “Termička stabilnost, mehanizam i kinetika razgradnje kompleksa kobalta(II), cinka(II) i kadijuma(II) sa N-benziloksikarbonilglicinom.” 2014. Thesis, Univerzitet u Beogradu. Accessed April 10, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:6704/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Šumar-Ristović, Maja, 1971-. “Termička stabilnost, mehanizam i kinetika razgradnje kompleksa kobalta(II), cinka(II) i kadijuma(II) sa N-benziloksikarbonilglicinom.” 2014. Web. 10 Apr 2021.

Vancouver:

Šumar-Ristović, Maja 1. Termička stabilnost, mehanizam i kinetika razgradnje kompleksa kobalta(II), cinka(II) i kadijuma(II) sa N-benziloksikarbonilglicinom. [Internet] [Thesis]. Univerzitet u Beogradu; 2014. [cited 2021 Apr 10]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:6704/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Šumar-Ristović, Maja 1. Termička stabilnost, mehanizam i kinetika razgradnje kompleksa kobalta(II), cinka(II) i kadijuma(II) sa N-benziloksikarbonilglicinom. [Thesis]. Univerzitet u Beogradu; 2014. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:6704/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations