subject:(PMMA)

NSYSU

1. Chen, China-Nan. A Study of Promoting Competitiveness of PMMA-A Case of S Company.

Degree: Master, EMBA, 2011, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0822111-143119

► Abstract The company main S petrochemical industry as the research objects, about the company in the petrochemical industry in the production of poly methyl meth… (more)

Subjects/Keywords: Petrochemical; PMMA; Competitiveness

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APA (6^th Edition):

Chen, C. (2011). A Study of Promoting Competitiveness of PMMA-A Case of S Company. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0822111-143119

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):

Chen, China-Nan. “A Study of Promoting Competitiveness of PMMA-A Case of S Company.” 2011. Thesis, NSYSU. Accessed October 01, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0822111-143119.

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

MLA Handbook (7^th Edition):

Chen, China-Nan. “A Study of Promoting Competitiveness of PMMA-A Case of S Company.” 2011. Web. 01 Oct 2020.

Vancouver:

Chen C. A Study of Promoting Competitiveness of PMMA-A Case of S Company. [Internet] [Thesis]. NSYSU; 2011. [cited 2020 Oct 01]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0822111-143119.

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

Council of Science Editors:

Chen C. A Study of Promoting Competitiveness of PMMA-A Case of S Company. [Thesis]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0822111-143119

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

University of Illinois – Chicago

2. Huang, Su. Improving Polymethyl Methacrylate Resin Using a Novel Nano-Ceramic Coating.

Degree: 2017, University of Illinois – Chicago

URL: http://hdl.handle.net/10027/22059

► Poly (methyl methacrylate) (PMMA) has been broadly applied in dental implant supported restorations and removable dentures. These prostheses are used by 10’s of millions of… (more)

Subjects/Keywords: PMMA; TiO2; ALD

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APA (6^th Edition):

Huang, S. (2017). Improving Polymethyl Methacrylate Resin Using a Novel Nano-Ceramic Coating. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/22059

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):

Huang, Su. “Improving Polymethyl Methacrylate Resin Using a Novel Nano-Ceramic Coating.” 2017. Thesis, University of Illinois – Chicago. Accessed October 01, 2020. http://hdl.handle.net/10027/22059.

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

MLA Handbook (7^th Edition):

Huang, Su. “Improving Polymethyl Methacrylate Resin Using a Novel Nano-Ceramic Coating.” 2017. Web. 01 Oct 2020.

Vancouver:

Huang S. Improving Polymethyl Methacrylate Resin Using a Novel Nano-Ceramic Coating. [Internet] [Thesis]. University of Illinois – Chicago; 2017. [cited 2020 Oct 01]. Available from: http://hdl.handle.net/10027/22059.

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

Council of Science Editors:

Huang S. Improving Polymethyl Methacrylate Resin Using a Novel Nano-Ceramic Coating. [Thesis]. University of Illinois – Chicago; 2017. Available from: http://hdl.handle.net/10027/22059

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

Louisiana State University

3. Dathathreya, Kavya. Characterization of Thermoplastic Fusion Bonding of Microchannels using Pressure Assisted Boiling Point Control System.

Degree: MS, Mechanical Engineering, 2016, Louisiana State University

URL: etd-11072016-164144 ; https://digitalcommons.lsu.edu/gradschool_theses/4537

► An innovative method of thermoplastic fusion bonding using a pressure assisted boiling point control (PABP) system was characterized to determine the optimum parameters for bonding… (more)

▼ An innovative method of thermoplastic fusion bonding using a pressure assisted boiling point control (PABP) system was characterized to determine the optimum parameters for bonding polymethyl methacrylate (PMMA) components containing microchannels and thin, 250 µm cover sheets. The PABP system enables precise control of the temperature boundary condition and the applied pressure by immersing the components being bonded in boiling water and varying the vapor pressure. Test structure geometries containing microchannels of two depths and four different aspect ratios were designed: 1:10 (Depth: 10µm, Width: 100 µm and Depth: 5µm, Width: 50 µm), 1:50 (Depth: 10µm, Width: 500µm and Depth: 5µm, Width: 250 µm), 1:100 (Depth: 10µm, Width: 1000µm and Depth: 5µm, Width: 500µm) and 1:200 (Depth: 10µm, Width: 2000µm and Depth: 5µm, Width: 1000µm). Microchannels were hot embossed using micro-milled brass mold inserts. Bonding conditions were optimized by observing microchannel deformation under a microscope. The quality of the bonded samples were rupture and leak tested to determine the integrity and strength of the bonds. Mean rupture pressures for channels of AR of 1:10, 1:50 and 1:100 were 851.02 kPa, 780.14 kPa and 706.09 kPa repectively for shallower channels and 831.93 kPa, 739.3 kPa and 524.38 kPa respectively for deeper channels bonded using open loop system. Rupture pressure decreased with decreasing AR and was higher for shallower channels. A closed loop control system was developed for the automatic temperature control. Results of bonding with both open loop and closed loop systems were compared. Mean rupture pressure for channels of AR 1:10, 1:50 and 1:100 for 5 µm depth were 977.54 kPa, 930.93 kPa and 751.39 kPa respectively and 912.11 kPa, 800.07 kPa and 550.96 kPa respectively for 10 µm depth. It was found that the rupture test results were more consistent and repeatable with closed loop system because of better control of the bonding temperature.

Subjects/Keywords: PMMA; microchannels; bonding

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APA (6^th Edition):

Dathathreya, K. (2016). Characterization of Thermoplastic Fusion Bonding of Microchannels using Pressure Assisted Boiling Point Control System. (Masters Thesis). Louisiana State University. Retrieved from etd-11072016-164144 ; https://digitalcommons.lsu.edu/gradschool_theses/4537

Chicago Manual of Style (16^th Edition):

Dathathreya, Kavya. “Characterization of Thermoplastic Fusion Bonding of Microchannels using Pressure Assisted Boiling Point Control System.” 2016. Masters Thesis, Louisiana State University. Accessed October 01, 2020. etd-11072016-164144 ; https://digitalcommons.lsu.edu/gradschool_theses/4537.

MLA Handbook (7^th Edition):

Dathathreya, Kavya. “Characterization of Thermoplastic Fusion Bonding of Microchannels using Pressure Assisted Boiling Point Control System.” 2016. Web. 01 Oct 2020.

Vancouver:

Dathathreya K. Characterization of Thermoplastic Fusion Bonding of Microchannels using Pressure Assisted Boiling Point Control System. [Internet] [Masters thesis]. Louisiana State University; 2016. [cited 2020 Oct 01]. Available from: etd-11072016-164144 ; https://digitalcommons.lsu.edu/gradschool_theses/4537.

Council of Science Editors:

Dathathreya K. Characterization of Thermoplastic Fusion Bonding of Microchannels using Pressure Assisted Boiling Point Control System. [Masters Thesis]. Louisiana State University; 2016. Available from: etd-11072016-164144 ; https://digitalcommons.lsu.edu/gradschool_theses/4537

4. Rangel de Sousa, Alexandre. Estudo do efeito combinado da degradação por radiação gama e fratura sob tensão ambiental (ESC) nas propriedades de polímeros vítreos .

Degree: 2008, Universidade Federal de Pernambuco

URL: http://repositorio.ufpe.br/handle/123456789/9422

► O objetivo deste estudo foi avaliar a degradação por fratura sob tensão ambiental (environmental stress cracking ou ESC) de alguns polímeros vítreos, o poli(metacrilato de… (more)

Subjects/Keywords: PMMA; PMMA-tenacificado (PMMA-t); PS; Degradação; Radiação gama; ESC.

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APA (6^th Edition):

Rangel de Sousa, A. (2008). Estudo do efeito combinado da degradação por radiação gama e fratura sob tensão ambiental (ESC) nas propriedades de polímeros vítreos . (Thesis). Universidade Federal de Pernambuco. Retrieved from http://repositorio.ufpe.br/handle/123456789/9422

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):

Rangel de Sousa, Alexandre. “Estudo do efeito combinado da degradação por radiação gama e fratura sob tensão ambiental (ESC) nas propriedades de polímeros vítreos .” 2008. Thesis, Universidade Federal de Pernambuco. Accessed October 01, 2020. http://repositorio.ufpe.br/handle/123456789/9422.

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

MLA Handbook (7^th Edition):

Rangel de Sousa, Alexandre. “Estudo do efeito combinado da degradação por radiação gama e fratura sob tensão ambiental (ESC) nas propriedades de polímeros vítreos .” 2008. Web. 01 Oct 2020.

Vancouver:

Rangel de Sousa A. Estudo do efeito combinado da degradação por radiação gama e fratura sob tensão ambiental (ESC) nas propriedades de polímeros vítreos . [Internet] [Thesis]. Universidade Federal de Pernambuco; 2008. [cited 2020 Oct 01]. Available from: http://repositorio.ufpe.br/handle/123456789/9422.

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

Council of Science Editors:

Rangel de Sousa A. Estudo do efeito combinado da degradação por radiação gama e fratura sob tensão ambiental (ESC) nas propriedades de polímeros vítreos . [Thesis]. Universidade Federal de Pernambuco; 2008. Available from: http://repositorio.ufpe.br/handle/123456789/9422

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

University of Alberta

5. Toossi, Amirali. Efficient Microwave Susceptor Design for Wafer Bonding Applications.

Degree: MS, Department of Electrical and Computer Engineering, 2012, University of Alberta

URL: https://era.library.ualberta.ca/files/fn106z62p

► This MSc Thesis demonstrates the use of a novel efficient metallic susceptor for generating controllable and rapid localized heating for low-cost substrate bonding using commercial… (more)

Subjects/Keywords: Bonding; Microwave; PMMA; microwave oven

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APA (6^th Edition):

Toossi, A. (2012). Efficient Microwave Susceptor Design for Wafer Bonding Applications. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/fn106z62p

Chicago Manual of Style (16^th Edition):

Toossi, Amirali. “Efficient Microwave Susceptor Design for Wafer Bonding Applications.” 2012. Masters Thesis, University of Alberta. Accessed October 01, 2020. https://era.library.ualberta.ca/files/fn106z62p.

MLA Handbook (7^th Edition):

Toossi, Amirali. “Efficient Microwave Susceptor Design for Wafer Bonding Applications.” 2012. Web. 01 Oct 2020.

Vancouver:

Toossi A. Efficient Microwave Susceptor Design for Wafer Bonding Applications. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2020 Oct 01]. Available from: https://era.library.ualberta.ca/files/fn106z62p.

Council of Science Editors:

Toossi A. Efficient Microwave Susceptor Design for Wafer Bonding Applications. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/fn106z62p

Universidade Estadual de Campinas

6. Nogueira, Telma Regina. Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides.

Degree: 2012, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777

► Abstract: Recently, nanocomposites consisting of polymer and mineral clays have attracted considerable scientific interest. Most published works on the production of polymer nanocomposites use clay… (more)

▼ Abstract: Recently, nanocomposites consisting of polymer and mineral clays have attracted considerable scientific interest. Most published works on the production of polymer nanocomposites use clay mineral fillers such as montmorillonite, modified with cationic surfactants. Another class of anionic exchanger is layered double hydroxides (LDH), which rarely occur in nature but are very simple and inexpensive to synthesize, allowing the production of highly defined composition material. In this study we have investigated "in situ" bulk polymerization of methyl methacrylate (MMA) in the presence of LDHs intercalated by organic anions (dodecyl sulfate, laurate, stearate). There are few studies in the open literature on the mechanical and thermal properties of PMMA nanocomposites reinforced with hydrophobic HDLs and so far it was not found in open literature studies about the mechanical and thermal properties of the PMMA nanocomposites reinforced with stearate intercalated LDHs. In our laboratory, the investigation in the nanocomposites area started recently, however, some results on the nanocomposites of polystyrene and layered double hydroxides have already been produced. In the present work were synthesized nanocomposites with high transparence in the visible region as well as nanocomposites with an uniform orange color, without the addition of dyes or pigments. By thermogravimetric analysis, the results showed that the addition of LDHs may increase PMMA decomposition temperature in more than 80°C. The results of dynamic mechanical analysis, for nanocomposites with 1wt% of LDHs, showed that elastic modulus more than 2 times higher than PMMA in the range of studied temperature. In order to verify how the LDH concentration could affect the previously evaluated properties, nanocomposites containing six different pre-selected LDHs, in two different concentrations (3% and 5%) were synthesized. These results demonstrated that most of these nanocomposites presented microhardness values higher than those found for PMMA Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Lona, Liliane Maria Ferrareso, 1966- (advisor), Wypych, Fernando (coadvisor), Universidade Estadual de Campinas. Faculdade de Engenharia Química (institution), Programa de Pós-Graduação em Engenharia Química (nameofprogram), Sayer, Claudia (committee member), Giordani, Domingos Savio (committee member), Marangoni, Rafael (committee member), Santos, Paula Sbaite Duarte dos (committee member).

Subjects/Keywords: Nanocompósitos (Materiais); PMMA1; Nanocomposites; PMMA

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APA (6^th Edition):

Nogueira, T. R. (2012). Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777

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):

Nogueira, Telma Regina. “Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides.” 2012. Thesis, Universidade Estadual de Campinas. Accessed October 01, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777.

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

MLA Handbook (7^th Edition):

Nogueira, Telma Regina. “Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides.” 2012. Web. 01 Oct 2020.

Vancouver:

Nogueira TR. Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides. [Internet] [Thesis]. Universidade Estadual de Campinas; 2012. [cited 2020 Oct 01]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777.

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

Council of Science Editors:

Nogueira TR. Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides. [Thesis]. Universidade Estadual de Campinas; 2012. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777

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

Vanderbilt University

7. Engerer, Kristin Jean. Mapping the Electromagnetic Near Field of Gold Nanoparticles in Poly(methyl) Methacrylate.

Degree: MS, Interdisciplinary Materials Science, 2016, Vanderbilt University

URL: http://hdl.handle.net/1803/14671

► As electronic and optical devices shrink to the nanoscale, accurate methods for characterizing electromagnetic fields generated by sub-wavelength structures become increasingly important. Absorption in poly(methyl… (more)

Subjects/Keywords: laser; simulation; fabrication; PMMA

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

APA (6^th Edition):

Engerer, K. J. (2016). Mapping the Electromagnetic Near Field of Gold Nanoparticles in Poly(methyl) Methacrylate. (Thesis). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/14671

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):

Engerer, Kristin Jean. “Mapping the Electromagnetic Near Field of Gold Nanoparticles in Poly(methyl) Methacrylate.” 2016. Thesis, Vanderbilt University. Accessed October 01, 2020. http://hdl.handle.net/1803/14671.

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

MLA Handbook (7^th Edition):

Engerer, Kristin Jean. “Mapping the Electromagnetic Near Field of Gold Nanoparticles in Poly(methyl) Methacrylate.” 2016. Web. 01 Oct 2020.

Vancouver:

Engerer KJ. Mapping the Electromagnetic Near Field of Gold Nanoparticles in Poly(methyl) Methacrylate. [Internet] [Thesis]. Vanderbilt University; 2016. [cited 2020 Oct 01]. Available from: http://hdl.handle.net/1803/14671.

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

Council of Science Editors:

Engerer KJ. Mapping the Electromagnetic Near Field of Gold Nanoparticles in Poly(methyl) Methacrylate. [Thesis]. Vanderbilt University; 2016. Available from: http://hdl.handle.net/1803/14671

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

NSYSU

8. Tsai, Hsin-Tung. Application of polymer material by mimicking nature hydrogen bonding.

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

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727110-103452

► This research includes two topics. The first topic is prepared a series of poly(methyl methacrylate) (PMMA)-based copolymers through free radical copolymerizations of methyl methacrylate in… (more)

▼ This research includes two topics. The first topic is prepared a series of poly(methyl methacrylate) (PMMA)-based copolymers through free radical copolymerizations of methyl methacrylate in the presence of the either 2 - vinyl - 4,6 -diamino - 1, 3, 5triazine(VDAT) or vinylbenzyl -thymine (VBT). Using 1H nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), we investigated the thermal properties and hydrogen-bonding interactions within blends of the two copolymers poly(2-vinyl-4,6-diamino-1,3,5-triazine-co-methyl methacrylate) (PVD AT-co-PMMA) and poly(vinylbenzylthymine-co-methyl methacrylate) (PVBT-co-PMMA). A large positive deviation in the behavior of the glass transition temperature determined by using the Kwei equation and DSC analyses indicated that strong multiple hydrogen-bonding interactions existed between the two copolymers. The FTIR and solid-state NMR spectroscopic analyses provided positive evidence for the presence of three hydrogen bonds between the diamino-1,3,5-triazine groups of PVDAT and thymine groups of PVBT. The second topic is synthesized a series of alkyne end-terminated poly(Î³-Benzyl L-glutamate) (alkyne-PBLG), which was prepared by the ring-opening polymerization of the N-carboxyanhydride monomer of Î³-Benzyl L-glutamate-carboxyanhydride. Then combination of the alkyne-PBLG with polyhedral oligomeric silsesquioxanes (POSS) with eight function groups are prepared through the click reation and formed a peptide-based block polymer with Î±-helice and Î²-sheet conformations. The thermal properties and structure of these polypeptides were characterized by using 1H NMR and FTIR. The FTIR, solid-state NMR and WXRD spectroscopic analyses provided evidence for the change of secondary structure between POSS and terminated peptide group, so that the conformation of Î²-sheets and Î±-helices would be influenced by the incorporation of POSS nanoparticle. Advisors/Committee Members: Y.W. Chiang (chair), Jin-Long Hong (chair), Shiao-Wei Kuo (committee member), Ming Chen (chair).

Subjects/Keywords: PBLG; PMMA; Polymer blend

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APA (6^th Edition):

Tsai, H. (2010). Application of polymer material by mimicking nature hydrogen bonding. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727110-103452

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):

Tsai, Hsin-Tung. “Application of polymer material by mimicking nature hydrogen bonding.” 2010. Thesis, NSYSU. Accessed October 01, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727110-103452.

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

MLA Handbook (7^th Edition):

Tsai, Hsin-Tung. “Application of polymer material by mimicking nature hydrogen bonding.” 2010. Web. 01 Oct 2020.

Vancouver:

Tsai H. Application of polymer material by mimicking nature hydrogen bonding. [Internet] [Thesis]. NSYSU; 2010. [cited 2020 Oct 01]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727110-103452.

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

Council of Science Editors:

Tsai H. Application of polymer material by mimicking nature hydrogen bonding. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727110-103452

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

Universidade do Rio Grande do Norte

9. Pereira, André Anderson Costa. Desenvolvimento de sistema de atomização de solução polimérica em meio circulante para obtenção de partículas nano .

Degree: 2018, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/25447

► Polymeric particles formed on a nanometric scale are of fundamental interest today, especially when used as carrier systems in the controlled release of drugs, cosmetics… (more)

▼ Polymeric particles formed on a nanometric scale are of fundamental interest today, especially when used as carrier systems in the controlled release of drugs, cosmetics and nutraceuticals, as well as in the coating of materials with magnetic properties. The present study aims to develop a system for the production of poly (methyl methacrylate) (PMMA) and polycaprolactone (PCL) particles from the atomization of polymer solution in antisolvent medium. In this system, polymer solutions in different solvents are prepared and atomized in the form of a spray. The droplets generated with the atomization come into contact with an antisolvent liquid which causes the precipitation and formation of the polymer particles. In this work, experiments using the proposed system were performed under different operating conditions and the particles obtained were analyzed by Dynamic Light Scattering (DLS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results demonstrated that it is possible to obtain particles with characteristics of nanospheres / nanocapsules and nanofibers with size distribution in the range of 50 to 5000 nm. It was also possible to observe that the process variables such as the nature of the polymer, type of solvent (acetone, ethyl acetate, ethyl alcohol, isopropyl alcohol and propyl alcohol), atomization pressure (0.25-3 bar) and antisolvent medium temperature (10-40°C) directly affect the morphology and particle size distribution (DTP). In addition, the potential of encapsulation of the proposed system was evaluated. Cotton oil and iron aluminate (inverse spinel) were used as the material to be encapsulated. The particles produced in this evaluation were analyzed by DLS, MET, field emission scanning electron microscopy (MEV-FEG), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) for the encapsulation check. According to these results, it was verified the formation of carrier particles, with characteristics of nanocapsules and nanospheres. That is, the encapsulated material can be found within the polymer particle or adhered to the surface thereof, respectively. Advisors/Committee Members: Oliveira, Jackson Araújo de (advisor), 65331060587 (advisor), Sousa, Elisa Maria Bittencourt Dutra de (advisor), 29171156453 (advisor).

Subjects/Keywords: Atomização; Nanoprecipitacão; PMMA; PCL; Encapsulamento

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APA (6^th Edition):

Pereira, A. A. C. (2018). Desenvolvimento de sistema de atomização de solução polimérica em meio circulante para obtenção de partículas nano . (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/25447

Chicago Manual of Style (16^th Edition):

Pereira, André Anderson Costa. “Desenvolvimento de sistema de atomização de solução polimérica em meio circulante para obtenção de partículas nano .” 2018. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed October 01, 2020. http://repositorio.ufrn.br/handle/123456789/25447.

MLA Handbook (7^th Edition):

Pereira, André Anderson Costa. “Desenvolvimento de sistema de atomização de solução polimérica em meio circulante para obtenção de partículas nano .” 2018. Web. 01 Oct 2020.

Vancouver:

Pereira AAC. Desenvolvimento de sistema de atomização de solução polimérica em meio circulante para obtenção de partículas nano . [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2018. [cited 2020 Oct 01]. Available from: http://repositorio.ufrn.br/handle/123456789/25447.

Council of Science Editors:

Pereira AAC. Desenvolvimento de sistema de atomização de solução polimérica em meio circulante para obtenção de partículas nano . [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2018. Available from: http://repositorio.ufrn.br/handle/123456789/25447

10. Medeiros, Felipe Albuquerque. Caracterização de blenda poli-cloreto de vinila e poli-metacrilato de metila, processamento, propriedades e potencial de aplicação.

Degree: Mestrado, Engenharia Metalúrgica e de Materiais, 2014, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19032015-170252/ ;

►

As blendas poliméricas são importante alternativa ao mercado para se conseguir de forma economicamente vantajosa ou sob o ponto de vista de processabilidade produtos com… (more)

Subjects/Keywords: Blend; Blenda; PMMA; PMMA; Polímero; Polymer; PVC; PVC

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

APA (6^th Edition):

Medeiros, F. A. (2014). Caracterização de blenda poli-cloreto de vinila e poli-metacrilato de metila, processamento, propriedades e potencial de aplicação. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19032015-170252/ ;

Chicago Manual of Style (16^th Edition):

Medeiros, Felipe Albuquerque. “Caracterização de blenda poli-cloreto de vinila e poli-metacrilato de metila, processamento, propriedades e potencial de aplicação.” 2014. Masters Thesis, University of São Paulo. Accessed October 01, 2020. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19032015-170252/ ;.

MLA Handbook (7^th Edition):

Medeiros, Felipe Albuquerque. “Caracterização de blenda poli-cloreto de vinila e poli-metacrilato de metila, processamento, propriedades e potencial de aplicação.” 2014. Web. 01 Oct 2020.

Vancouver:

Medeiros FA. Caracterização de blenda poli-cloreto de vinila e poli-metacrilato de metila, processamento, propriedades e potencial de aplicação. [Internet] [Masters thesis]. University of São Paulo; 2014. [cited 2020 Oct 01]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19032015-170252/ ;.

Council of Science Editors:

Medeiros FA. Caracterização de blenda poli-cloreto de vinila e poli-metacrilato de metila, processamento, propriedades e potencial de aplicação. [Masters Thesis]. University of São Paulo; 2014. Available from: http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19032015-170252/ ;

Universidade do Rio Grande do Norte

11. Pereira, André Anderson Costa. Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica .

Degree: 2013, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/15841

► Polymer particles in the nanometer range are of fundamental interest today, especially when used as carrier systems in the controlled release of drugs, cosmetics and… (more)

Subjects/Keywords: PMMA. Cristalização térmica. Partículas submicrométricas; PMMA. Thermal crystallization. Submicron particles

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

APA (6^th Edition):

Pereira, A. A. C. (2013). Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/15841

Chicago Manual of Style (16^th Edition):

Pereira, André Anderson Costa. “Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica .” 2013. Masters Thesis, Universidade do Rio Grande do Norte. Accessed October 01, 2020. http://repositorio.ufrn.br/handle/123456789/15841.

MLA Handbook (7^th Edition):

Pereira, André Anderson Costa. “Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica .” 2013. Web. 01 Oct 2020.

Vancouver:

Pereira AAC. Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2013. [cited 2020 Oct 01]. Available from: http://repositorio.ufrn.br/handle/123456789/15841.

Council of Science Editors:

Pereira AAC. Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica . [Masters Thesis]. Universidade do Rio Grande do Norte; 2013. Available from: http://repositorio.ufrn.br/handle/123456789/15841

Universidade do Rio Grande do Norte

12. Pereira, André Anderson Costa. Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica .

Degree: 2013, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/15841

► Polymer particles in the nanometer range are of fundamental interest today, especially when used as carrier systems in the controlled release of drugs, cosmetics and… (more)

Subjects/Keywords: PMMA. Cristalização térmica. Partículas submicrométricas; PMMA. Thermal crystallization. Submicron particles

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

APA (6^th Edition):

Pereira, A. A. C. (2013). Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica . (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/15841

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):

Pereira, André Anderson Costa. “Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica .” 2013. Thesis, Universidade do Rio Grande do Norte. Accessed October 01, 2020. http://repositorio.ufrn.br/handle/123456789/15841.

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

MLA Handbook (7^th Edition):

Pereira, André Anderson Costa. “Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica .” 2013. Web. 01 Oct 2020.

Vancouver:

Pereira AAC. Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica . [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2013. [cited 2020 Oct 01]. Available from: http://repositorio.ufrn.br/handle/123456789/15841.

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

Council of Science Editors:

Pereira AAC. Formação de particulas submicrometricas de pmma por cristalização termica de solução polimérica . [Thesis]. Universidade do Rio Grande do Norte; 2013. Available from: http://repositorio.ufrn.br/handle/123456789/15841

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

Université Montpellier II

13. Vahabi, Sayyed Hossein. Combinaison de nanoparticules et de composés phosphonés pour améliorer le comportement au feu du PMMA : Improvement of flame retardancy of PMMA, combination of nanoparticles and phosphonated compound.

Degree: Docteur es, Chimie et Physicochimie des matériaux, 2011, Université Montpellier II

URL: http://www.theses.fr/2011MON20095

►

Le polyméthacrylate de méthyle (PMMA) est un thermoplastique présentant de nombreux avantages (transparence, légèreté, flexibilité). Cependant, le caractère inflammable du PMMA est un frein pour… (more)

▼

Le polyméthacrylate de méthyle (PMMA) est un thermoplastique présentant de nombreux avantages (transparence, légèreté, flexibilité). Cependant, le caractère inflammable du PMMA est un frein pour son utilisation dans de nombreuses applications, connaissant les pertes humaines et matérielles causés par les incendies. Cette thèse avait donc pour but d'améliorer la stabilité thermique et le comportement au feu du PMMA. Dans un premier temps, nous avons étudié l'influence de la dispersion de kaolins purs et traités sur le comportement au feu et la dégradation thermique du PMMA. Nous nous sommes ensuite orientés vers la modification chimique du PMMA par la méthode de copolymérisation du méthacrylate de méthyle (MMA) avec deux co-monomères phosphonés. Enfin, nous nous sommes intéressés à l'incorporation chimique ou physique de deux types de particules de polyhedral oligomeric silsesquioxane (POSS) dans le PMMA ou dans le PMMA modifié (copolymère (MMA – co- monomère monophosphoné)). Cette dernière partie a permis de mettre évidence l'effet bénéfique de la combinaison des particules de POSS et du PMMA modifié sur la dégradation thermique et l'inflammabilité de PMMA. Dans nos travaux, une attention particulière a été portée sur l'effet de phosphore en phase gazeuse et en phase condensée. Dans ce contexte nous avons pu définir, pour le PMMA modifié par les co-monomères phosphonés, un indice d'efficacité du phosphore pour chaque phase.

Poly(methylmethacrylate) (PMMA) is an important thermoplastic, widely used in industry. Unfortunately, it is a highly flammable polymer. The aim of this research was to improve the thermal stability and fire behavior of PMMA. First, we studied the influence of the dispersion of pure or treated kaolin on the fire behavior and thermal stability of PMMA. In second part of this work, the chemical modification of PMMA, using copolymerization of methyl methacrylate (MMA) with two phosphonated co-monomers was studied. Finally, we interested in chemical or physical incorporation of two types of polyhedral oligomeric silsesquioxane particles (POSS) in the PMMA or modified PMMA copolymère (MMA – co- monophosphonated monomer)). The effect of the combination of POSS particles and modified PMMA on the thermal degradation and flammability of PMMA was studied. In our work, the effect of phosphorus in the gas and condensed phase was separately studied. This study allowed us to define an efficiency index of phosphorus in each phase.

Advisors/Committee Members: Lopez-Cuesta, José-Marie (thesis director).

Subjects/Keywords: Comportement au feu; Pmma; Phosphore; Nanoparticules; Flame retardancy; Pmma; Phosphorus; Nanoparticles

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

APA (6^th Edition):

Vahabi, S. H. (2011). Combinaison de nanoparticules et de composés phosphonés pour améliorer le comportement au feu du PMMA : Improvement of flame retardancy of PMMA, combination of nanoparticles and phosphonated compound. (Doctoral Dissertation). Université Montpellier II. Retrieved from http://www.theses.fr/2011MON20095

Chicago Manual of Style (16^th Edition):

Vahabi, Sayyed Hossein. “Combinaison de nanoparticules et de composés phosphonés pour améliorer le comportement au feu du PMMA : Improvement of flame retardancy of PMMA, combination of nanoparticles and phosphonated compound.” 2011. Doctoral Dissertation, Université Montpellier II. Accessed October 01, 2020. http://www.theses.fr/2011MON20095.

MLA Handbook (7^th Edition):

Vahabi, Sayyed Hossein. “Combinaison de nanoparticules et de composés phosphonés pour améliorer le comportement au feu du PMMA : Improvement of flame retardancy of PMMA, combination of nanoparticles and phosphonated compound.” 2011. Web. 01 Oct 2020.

Vancouver:

Vahabi SH. Combinaison de nanoparticules et de composés phosphonés pour améliorer le comportement au feu du PMMA : Improvement of flame retardancy of PMMA, combination of nanoparticles and phosphonated compound. [Internet] [Doctoral dissertation]. Université Montpellier II; 2011. [cited 2020 Oct 01]. Available from: http://www.theses.fr/2011MON20095.

Council of Science Editors:

Vahabi SH. Combinaison de nanoparticules et de composés phosphonés pour améliorer le comportement au feu du PMMA : Improvement of flame retardancy of PMMA, combination of nanoparticles and phosphonated compound. [Doctoral Dissertation]. Université Montpellier II; 2011. Available from: http://www.theses.fr/2011MON20095

Universidade do Rio Grande do Norte

14. Macedo, Thatiana Cristina Pereira de. Processamento e caracterização da Blenda poli(metacrilato de metila) (PMMA) com partículas elastoméricas e policarbonato (PC) .

Degree: 2017, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/23381

► The aim of this work was to study the rheological, mechanical and microstructural behavior of poly (methyl methacrylate)/polycarbonate (PMMA/PC) blends using a PMMA with elastomeric… (more)

▼ The aim of this work was to study the rheological, mechanical and microstructural behavior of poly (methyl methacrylate)/polycarbonate (PMMA/PC) blends using a PMMA with elastomeric particles until phase inversion. The PMMA/PC blends were processed in single screw extruder and co-rotational twin screw extruder, with subsequent injection molding. The changes in the physical and chemical characteristics of the polycarbonate were analyzed by viscosimetry and by Fourier transform infrared spectroscopy (FTIR) before and after processing. The mechanical characterizations were performed by uniaxial tensile test and Izod impact. The rheological tests were done by melt flow index (MFI) and capillary rheometry. Microstructural analysis of the polymer blends was performed using atomic force microscopy (AFM) and scanning electron microscopy (SEM). The thermal degradation temperature was determined by thermogravimetric analysis (TGA). The results of the MFI in the processing conditions indicated a higher flowability of the polycarbonate among all the studied compositions; most of them present higher value of MFI for the materials processed in twin screw extruder. In the capillary rheometry of the unprocessed materials a lower PC viscosity variation was observed as a function of the shear rate increase. TGA showed a higher degradation onset temperature for the PC, but the processing altered the thermal stability of that polymer more than for poly (methyl methacrylate). The intrinsic viscosity measurements of the polycarbonate indicated a possible degradation by chain scission after processing due to the decrease in the molar mass of the material. The FTIR did not identify distinct bands for the PC before and after the processing. The mechanical characterization by uniaxial tensile revealed higher tensile strength, higher modulus of elasticity and greater elongation at break for polycarbonate, and the compatibility of PMMA/PC blends varied with PC concentration, with some compositions that showed synergism in the properties. Izod impact strength showed a high PC impact strength when compared to PMMA, but the addition of 20 wt% of PC in the PMMA matrix significantly increased the impact strength of PMMA/PC blends. The morphological analysis by AFM visualized the presence of spherical elastomeric particles with an average size of about 182 ± 20 nm in the PMMA, evenly distributed along its microstructure, while the PC presented only one homogeneous phase. The PMMA/PC blend showed two well-defined phases throughout all the compositions, and showed evidence of morphology with co-continuity characteristics for the compositions between 70/30 and 50/50 wt%, both for the materials processed in single screw extruders as well as twin screw extruders. The compositions with the highest percentage of PMMA in the PMMA/PC blends were the ones with the best results of rupture strength and elongation at break, and the Izod impact resistance showed intermediate properties. The results in the phase inversion followed the characteristics of the… Advisors/Committee Members: Ito, Edson Noriyuki (advisor), 40405036191 (advisor), http://lattes.cnpq.br/7249500407405478 (advisor).

Subjects/Keywords: Blenda PMMA/PC; PMMA elastomérico; Miscibilidade; Inversão de fase; Morfologia

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

APA (6^th Edition):

Macedo, T. C. P. d. (2017). Processamento e caracterização da Blenda poli(metacrilato de metila) (PMMA) com partículas elastoméricas e policarbonato (PC) . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/23381

Chicago Manual of Style (16^th Edition):

Macedo, Thatiana Cristina Pereira de. “Processamento e caracterização da Blenda poli(metacrilato de metila) (PMMA) com partículas elastoméricas e policarbonato (PC) .” 2017. Masters Thesis, Universidade do Rio Grande do Norte. Accessed October 01, 2020. http://repositorio.ufrn.br/handle/123456789/23381.

MLA Handbook (7^th Edition):

Macedo, Thatiana Cristina Pereira de. “Processamento e caracterização da Blenda poli(metacrilato de metila) (PMMA) com partículas elastoméricas e policarbonato (PC) .” 2017. Web. 01 Oct 2020.

Vancouver:

Macedo TCPd. Processamento e caracterização da Blenda poli(metacrilato de metila) (PMMA) com partículas elastoméricas e policarbonato (PC) . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2017. [cited 2020 Oct 01]. Available from: http://repositorio.ufrn.br/handle/123456789/23381.

Council of Science Editors:

Macedo TCPd. Processamento e caracterização da Blenda poli(metacrilato de metila) (PMMA) com partículas elastoméricas e policarbonato (PC) . [Masters Thesis]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/23381

Brno University of Technology

15. Šimík, Marcel. Plazmonické struktury vytvořené pomocí elektronové litografie: Plasmonic structures fabricated by e-beam lithography.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/33954

► The presented study deals with the process of the formation of plasmonic structures using electron beam lithography. The main aim of this work is to… (more)

Subjects/Keywords: Elektronová litografie; plazmonické struktury; PMMA.; Electron-beam lithography; plasmonic structures; PMMA.

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

APA (6^th Edition):

Šimík, M. (2018). Plazmonické struktury vytvořené pomocí elektronové litografie: Plasmonic structures fabricated by e-beam lithography. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/33954

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):

Šimík, Marcel. “Plazmonické struktury vytvořené pomocí elektronové litografie: Plasmonic structures fabricated by e-beam lithography.” 2018. Thesis, Brno University of Technology. Accessed October 01, 2020. http://hdl.handle.net/11012/33954.

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

MLA Handbook (7^th Edition):

Šimík, Marcel. “Plazmonické struktury vytvořené pomocí elektronové litografie: Plasmonic structures fabricated by e-beam lithography.” 2018. Web. 01 Oct 2020.

Vancouver:

Šimík M. Plazmonické struktury vytvořené pomocí elektronové litografie: Plasmonic structures fabricated by e-beam lithography. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2020 Oct 01]. Available from: http://hdl.handle.net/11012/33954.

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

Council of Science Editors:

Šimík M. Plazmonické struktury vytvořené pomocí elektronové litografie: Plasmonic structures fabricated by e-beam lithography. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/33954

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

Université de Sherbrooke

16. Rodriguez Ortega, Edwin. Hydrolyse de polylactides et de mélanges de polylactide/polyméthacrylate de méthyle.

Degree: 2018, Université de Sherbrooke

URL: http://hdl.handle.net/11143/11848

► Les polylactides (PLA) sont une famille de polymères biodégradables et biocompatibles de la famille des polyesters aliphatiques. Lorsque le PLA est dans un milieu humide… (more)

▼ Les polylactides (PLA) sont une famille de polymères biodégradables et biocompatibles de la famille des polyesters aliphatiques. Lorsque le PLA est dans un milieu humide et à une température excédant le 60°C, il se dépolymérise rapidement par hydrolyse, étape préalable à la biodégradation du PLA. Le PLA est utilisé dans le domaine biomédical et dans la fabrication de nombreux produits destinés, entre autres, à l’usage alimentaire tels que des emballages, des ustensiles et de la vaisselle jetable. Cependant, quand des applications à longue durée de vie sont visées, sa dégradation peut devenir une propriété non désirable. À cet égard, le mélanger avec un autre polymère est une des alternatives les plus simples et peu coûteuses afin de limiter cette dégradation. Le polyméthacrylate de méthyle (PMMA), un polymère thermoplastique et biocompatible avec de bonnes propriétés mécaniques et thermiques, est un candidat potentiel. Ce travail de recherche, divisé en deux étapes, consiste en l’étude de l’hydrolyse du PLA puis celle des mélanges PLA/PMMA aux températures supérieures à leur température de transition vitreuse, cela en milieu neutre, en milieu alcalin et, en certains cas, en milieu acide. La première étape de ce travail comprend l’étude de l’hydrolyse du PLA en fonction de sa capacité à cristalliser ainsi que de la température et de l’acidité du milieu d’hydrolyse en phase aqueuse. Pour l’effet de composition, deux PLA commerciaux qui différaient dans leurs ratios de compositions d’énantiomères L- et D- ont été sélectionnés. Le premier de ces PLA avait la capacité de cristalliser jusqu’à un taux d’environ 40% alors que le second était complètement amorphe. L’hydrolyse a été effectuée dans l’eau distillée (pH égal à 5.3) à 60, 70 et 80 °C pour évaluer l’effet de la température. Ensuite, les PLA ont été soumis à l’hydrolyse en milieu acide (pH égal à 1) et alcalin (pH égal à 12) à une température constante de 70°C afin d’évaluer l’effet de l’acidité et l’alcalinité du milieu. L’hydrolyse a été réalisée en suivant l’évolution de la perte de masse, du pourcentage d’eau absorbée, de l’évolution de la distribution de masse molaire et finalement de la température de fusion et du changement d’enthalpie qui y est associé. Les résultats ont montré que l’hydrolyse en milieu acide et neutre procède par un mécanisme d’érosion massique (i.e. érosion dans le cœur de l’échantillon) tandis qu’en milieu alcalin, l’hydrolyse du PLA suit principalement un mécanisme d’érosion surfacique. La cinétique de l’hydrolyse a été modélisée avec succès à l’aide d’un modèle exponentiel à deux étapes qui prend en compte chaque étape du mécanisme d’érosion. Indépendamment de leur composition énantiomérique et même si tous les échantillons étaient amorphes au début des essais, ils ont cristallisé rapidement durant l’hydrolyse. Dans une deuxième étape, l’hydrolyse des mélanges PLA/PMMA a été étudiée. L’ajout du PMMA avait pour but de ralentir la progression de l’hydrolyse puisque ce matériau est un polymère d’addition insensible à l’hydrolyse. Les… Advisors/Committee Members: Huneault, Michel (advisor), Marcos, Bernard (advisor).

Subjects/Keywords: PLA; PMMA; Hydrolyse du PLA; Mélange PLA/PMMA; Polyesters; Cinétique d'hydrolyse

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

APA (6^th Edition):

Rodriguez Ortega, E. (2018). Hydrolyse de polylactides et de mélanges de polylactide/polyméthacrylate de méthyle. (Doctoral Dissertation). Université de Sherbrooke. Retrieved from http://hdl.handle.net/11143/11848

Chicago Manual of Style (16^th Edition):

Rodriguez Ortega, Edwin. “Hydrolyse de polylactides et de mélanges de polylactide/polyméthacrylate de méthyle.” 2018. Doctoral Dissertation, Université de Sherbrooke. Accessed October 01, 2020. http://hdl.handle.net/11143/11848.

MLA Handbook (7^th Edition):

Rodriguez Ortega, Edwin. “Hydrolyse de polylactides et de mélanges de polylactide/polyméthacrylate de méthyle.” 2018. Web. 01 Oct 2020.

Vancouver:

Rodriguez Ortega E. Hydrolyse de polylactides et de mélanges de polylactide/polyméthacrylate de méthyle. [Internet] [Doctoral dissertation]. Université de Sherbrooke; 2018. [cited 2020 Oct 01]. Available from: http://hdl.handle.net/11143/11848.

Council of Science Editors:

Rodriguez Ortega E. Hydrolyse de polylactides et de mélanges de polylactide/polyméthacrylate de méthyle. [Doctoral Dissertation]. Université de Sherbrooke; 2018. Available from: http://hdl.handle.net/11143/11848

University of North Texas

17. Antoine, Donley. Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers.

Degree: 2013, University of North Texas

URL: https://digital.library.unt.edu/ark:/67531/metadc271772/

► Electrospinning has been recognized as an efficient technique for the fabrication of polymer fibers. These electrospun fibers have many applications across a broad range of… (more)

Subjects/Keywords: PMMA; PAN; nanofibers; composite material; light transmittance; PAN/PMMA

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

APA (6^th Edition):

Antoine, D. (2013). Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc271772/

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):

Antoine, Donley. “Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers.” 2013. Thesis, University of North Texas. Accessed October 01, 2020. https://digital.library.unt.edu/ark:/67531/metadc271772/.

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

MLA Handbook (7^th Edition):

Antoine, Donley. “Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers.” 2013. Web. 01 Oct 2020.

Vancouver:

Antoine D. Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers. [Internet] [Thesis]. University of North Texas; 2013. [cited 2020 Oct 01]. Available from: https://digital.library.unt.edu/ark:/67531/metadc271772/.

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

Council of Science Editors:

Antoine D. Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers. [Thesis]. University of North Texas; 2013. Available from: https://digital.library.unt.edu/ark:/67531/metadc271772/

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

18. Alvaro Ternes Neto. Desenvolvimento de nanoblendas poliméricas PMMA/SAN.

Degree: 2012, Universidade Federal de São Carlos

URL: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5314

►

A principal motivação para a realização deste trabalho de mestrado consistiu na idéia de que a obtenção de nanoblendas poliméricas é fundamentalmente dependente da elevada… (more)

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A principal motivação para a realização deste trabalho de mestrado consistiu na idéia de que a obtenção de nanoblendas poliméricas é fundamentalmente dependente da elevada interação entre as fases presentes na mistura. A estratégia adotada neste estudo baseou-se na utilização de dois polímeros que possuem uma janela de miscibilidade, o que permite o estabelecimento de uma condição de imiscibilidade muito próxima do limite desta janela, proporcionando reduzida tensão interfacial entre as fases. Nanoblendas poliméricas a base do poli(metacrilato de metila) (PMMA) como matriz e do copolímero poli(estireno-co-acrilonitrila) (SAN) como a fase nanométrica foram obtidas através da mistura mecânica em uma extrusora dupla rosca de bancada. A compatibilização entre as fases foi realizada através da incorporação do terpolímero (MGE) sintetizado a partir dos monômeros metacrilato de metila (MMA), metacrilato de glicidila (GMA) e acrilato de etila (EA). A morfologia das blendas foi caracterizada por microscopia eletrônica de transmissão (MET). A transparência das blendas bem como dos polímeros puros foi quantificada através de um ensaio de transmitância de luz visível. Também foram realizados ensaios de reometria de torque, reometria capilar, resistência à tração e resistência química a solventes. Na ausência do agente MGE foram obtidas nanoblendas para 1 e 3% em massa da fase dispersa. A introdução do terpolímero permitiu uma significativa redução no diâmetro numérico médio da fase SAN para as composições com 5 e 10% em massa. Essa diminuição fez com que fase dispersa da blenda com 5% de SAN atingisse dimensão inferior a 100 nm. Foi verificado que a transparência das blendas está diretamente relacionada à fração mássica da fase dispersa. As propriedades mecânicas das blendas foram próximas as da matriz. Os polímeros puros e as blendas não sofreram inchamento pelos solventes escolhidos.

The motivation for this work was the idea that nanoblends are fundamentally dependent on the high interaction between the phases in the mixture. The strategy adopted in this study was based on the use of two polymers that have a miscibility window, which allows the establishment of an immiscibility condition very close to the limit of this window, providing low interfacial tension between phases. Nanoblends of poly(methyl methacrylate) (PMMA) as the matrix and poly(styrene-co-acrylonitrile) (SAN) as the nanophase were obtained by blending in a twin screw extruder. The compatibilization between the phases was accomplished through the incorporation of the terpolymer (MGE) synthesized from the monomers methyl methacrylate (MMA), glycidyl methacrylate (GMA) and ethyl acrylate (EA). The morphology of the blends was characterized by transmission electron microscopy (TEM). The transparency of the blends and pure polymers was quantified by transmittance of visible light. Tests such as torque rheometry, capillary rheometry, tensile strength and chemical resistance to solvents were also performed. Nanoblends with 1 and 3 wt% of the dispersed phase were…

Advisors/Committee Members: Elias Hage Júnior.

Subjects/Keywords: Polímeros; Blendas poliméricas; Miscibilidade; PMMA/SAN; POLIMEROS

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

APA (6^th Edition):

Neto, A. T. (2012). Desenvolvimento de nanoblendas poliméricas PMMA/SAN. (Thesis). Universidade Federal de São Carlos. Retrieved from http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5314

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):

Neto, Alvaro Ternes. “Desenvolvimento de nanoblendas poliméricas PMMA/SAN.” 2012. Thesis, Universidade Federal de São Carlos. Accessed October 01, 2020. http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5314.

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

MLA Handbook (7^th Edition):

Neto, Alvaro Ternes. “Desenvolvimento de nanoblendas poliméricas PMMA/SAN.” 2012. Web. 01 Oct 2020.

Vancouver:

Neto AT. Desenvolvimento de nanoblendas poliméricas PMMA/SAN. [Internet] [Thesis]. Universidade Federal de São Carlos; 2012. [cited 2020 Oct 01]. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5314.

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

Council of Science Editors:

Neto AT. Desenvolvimento de nanoblendas poliméricas PMMA/SAN. [Thesis]. Universidade Federal de São Carlos; 2012. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5314

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

Penn State University

19. Ozdemir, Tugba. Nanofiber Mediated Osteoinduction Through Rhoa Gtpase Signaling.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/19195

► Mesenchymal stem cells have demonstrated osteogenic differentiation when cultured on fibrous tissue engineered scaffolds. However, the mechanisms underpinning a fiber’s ability to induce osteoinduction are… (more)

▼ Mesenchymal stem cells have demonstrated osteogenic differentiation when cultured on fibrous tissue engineered scaffolds. However, the mechanisms underpinning a fiber’s ability to induce osteoinduction are not understood. In vitro experimental models examining the interplay between surface topography and the cellular response have revealed that the initial event in cell sensing the underlying topography is through formation of adhesive structures, focal adhesions. Cells form focal adhesions through heterodimeric integrin receptors anchoring the surface, leading to a complex cascade of intracellular protein-protein interactions ultimately affecting transcriptional regulation and cellular differentiation. While elucidating adhesion mediated mechanisms, there currently exists a bias between deterministic and systematic approaches. The hypothesis driven deterministic approach and hypothesis deriving systematic approaches both seek mechanistic and realistic models to existing phenomenon. In this study, we combined both a deterministic model of mechanosensing of scaffold topography through RhoA/ROCK signaling and a systematic approach using siRNA mediated gene knowdown to determine the all possible kinase and phosphatases that take action in osteoinduction. We showed for the first time that osteoblasts differentiate on fibrous scaffolds in a MyosinIIa driven mechanism and siRNA screening based systematic experiments confirmed the MyosinIIa driven osteoinduction mechanism. While developing a framework for the solution, we not only developed new experimental platforms to study high-throughput interactions leading to osteogenesis, but also constructed a fundamental model aimed toward formalizing the topography sensing mechanisms leading to osteogenesis on fibrous bone tissue engineering scaffolds. Advisors/Committee Members: Justin Lee Brown, Dissertation Advisor/Co-Advisor, Justin Lee Brown, Committee Chair/Co-Chair, William O Hancock, Committee Member, Peter J Butler, Committee Member, Melik C Demirel, Committee Member.

Subjects/Keywords: Bone Tissue Engineering; PMMA; microtopography sensing

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

APA (6^th Edition):

Ozdemir, T. (2013). Nanofiber Mediated Osteoinduction Through Rhoa Gtpase Signaling. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/19195

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):

Ozdemir, Tugba. “Nanofiber Mediated Osteoinduction Through Rhoa Gtpase Signaling.” 2013. Thesis, Penn State University. Accessed October 01, 2020. https://submit-etda.libraries.psu.edu/catalog/19195.

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

MLA Handbook (7^th Edition):

Ozdemir, Tugba. “Nanofiber Mediated Osteoinduction Through Rhoa Gtpase Signaling.” 2013. Web. 01 Oct 2020.

Vancouver:

Ozdemir T. Nanofiber Mediated Osteoinduction Through Rhoa Gtpase Signaling. [Internet] [Thesis]. Penn State University; 2013. [cited 2020 Oct 01]. Available from: https://submit-etda.libraries.psu.edu/catalog/19195.

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

Council of Science Editors:

Ozdemir T. Nanofiber Mediated Osteoinduction Through Rhoa Gtpase Signaling. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/19195

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

The Ohio State University

20. Zheng, Fengyuan. The effect of PMMA stimulated Complement-Macrophage cascade on Osteogenesis of Preosteoblast-like MC3T3-E1 cells on PMMA surface.

Degree: PhD, Oral Biology, 2010, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1275497184

► A model of the initial complement mediated inflammatory response to tissue engineering (TE) scaffolds is developed in this study. TE has been given increasing… (more)

▼ A model of the initial complement mediated inflammatory response to tissue engineering (TE) scaffolds is developed in this study. TE has been given increasing attention in cases of large defects caused by severe trauma or disease based on the concept that the scaffold degrades and is replaced by tissue regeneration. Numerous attempts have been made to modify biomaterials chemical compositions, mechanical properties, and biomolecular incorporation to improve biocompatibility. The surface properties have been shown to affect host inflammatory responses and the ultimate fibrous capsule formation through foreign body reaction around implanted biomaterials. Although extensive research has been conducted regarding immune responses, such as macrophage activity, upon biomaterial particles and to a lesser extent on biomaterials surface, the inflammatory cascade and its effect on differentiation of preosteoblasts is not completely understood. Biomaterials are known to adsorb serum proteins and activate the complement system followed by subsequent inflammatory cascade. Complement activation through either direct deposition or interaction with adsorbed protein layer on biomaterial surface is believed to be the initiation process of inflammatory responses to implanted biomaterials. By setting the goal of constructing a tissue engineering model, the present study utilizes complement, macrophages, and preosteoblast-like cells to investigate the initial step of the inflammatory response and their effect on osteogenesis on biomaterial surface, poly(methylmethacrylate). PMMA polymer with different tacticities effects on MC3T3-E1 cell proliferation and differentiation were evaluated with cell proliferation and viability assay (MTS assay). In addition, their effect on MC3T3-E1 cell differentiation was assessed with MTS assay and osteogenic activity markers quantifications. No significant differences between different tacticity PMMA and tissue culture polystyrene were found. The effect of complement on macrophage, RAW264.7, activation on biomaterial surface was investigated in present study. Three cytokines, TNF-a, IL-6, and IL-1ß, expression were quantified with ELISA to evaluate macrophage activation on PMMA surfaces and particles. Cytokine expressions on PMMA surface were not significantly different from control group. At 6 hour, 1-10 µm PMMA beads induced significantly increased TNF-a expression. Mouse complement pretreatment resulted in increased expression of IL-6 and decreased expression of TNF-a while IL-1ß was barely detectable in present experimental conditions. Co-culture system is constructed by means of transferring RAW264.7 cell culture media to preosteoblast culture with corresponding material surfaces or particulates. The mRNA expression of Runx2, ON, and Collagen Type I are quantified with real time PCR to evaluate osteogenic activity of MC3T3-E1 cells under osteogenic condition. MC3T3-E1 cells cultured with osteogenic media supplemented with RAW264.7 cell culture media with LPS showed elongated… Advisors/Committee Members: Schricker, Scott (Committee Chair).

Subjects/Keywords: Materials Science; complement; macrophage; PMMA surface; osteoblast

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

APA (6^th Edition):

Zheng, F. (2010). The effect of PMMA stimulated Complement-Macrophage cascade on Osteogenesis of Preosteoblast-like MC3T3-E1 cells on PMMA surface. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1275497184

Chicago Manual of Style (16^th Edition):

Zheng, Fengyuan. “The effect of PMMA stimulated Complement-Macrophage cascade on Osteogenesis of Preosteoblast-like MC3T3-E1 cells on PMMA surface.” 2010. Doctoral Dissertation, The Ohio State University. Accessed October 01, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275497184.

MLA Handbook (7^th Edition):

Zheng, Fengyuan. “The effect of PMMA stimulated Complement-Macrophage cascade on Osteogenesis of Preosteoblast-like MC3T3-E1 cells on PMMA surface.” 2010. Web. 01 Oct 2020.

Vancouver:

Zheng F. The effect of PMMA stimulated Complement-Macrophage cascade on Osteogenesis of Preosteoblast-like MC3T3-E1 cells on PMMA surface. [Internet] [Doctoral dissertation]. The Ohio State University; 2010. [cited 2020 Oct 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1275497184.

Council of Science Editors:

Zheng F. The effect of PMMA stimulated Complement-Macrophage cascade on Osteogenesis of Preosteoblast-like MC3T3-E1 cells on PMMA surface. [Doctoral Dissertation]. The Ohio State University; 2010. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1275497184

NSYSU

21. Shih, Che-wei. Investigating the Mechanical Properties of Polymethylmethacrylate/Silver Nanoparticle Composites by Molecular Dynamics Simulation.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729116-155659

► The effect of weight fraction on the tensile behavior of the polymethylmethacrylate (PMMA) with mixing silver nanoparticles (PMMA/AgNPs) was investigated using molecular dynamics simulation (MD).… (more)

Subjects/Keywords: Molecular dynamics; PMMA; Ag nanoparticle; Mechanical property

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

APA (6^th Edition):

Shih, C. (2016). Investigating the Mechanical Properties of Polymethylmethacrylate/Silver Nanoparticle Composites by Molecular Dynamics Simulation. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729116-155659

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):

Shih, Che-wei. “Investigating the Mechanical Properties of Polymethylmethacrylate/Silver Nanoparticle Composites by Molecular Dynamics Simulation.” 2016. Thesis, NSYSU. Accessed October 01, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729116-155659.

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

MLA Handbook (7^th Edition):

Shih, Che-wei. “Investigating the Mechanical Properties of Polymethylmethacrylate/Silver Nanoparticle Composites by Molecular Dynamics Simulation.” 2016. Web. 01 Oct 2020.

Vancouver:

Shih C. Investigating the Mechanical Properties of Polymethylmethacrylate/Silver Nanoparticle Composites by Molecular Dynamics Simulation. [Internet] [Thesis]. NSYSU; 2016. [cited 2020 Oct 01]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729116-155659.

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

Council of Science Editors:

Shih C. Investigating the Mechanical Properties of Polymethylmethacrylate/Silver Nanoparticle Composites by Molecular Dynamics Simulation. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729116-155659

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

22. SILVA, William Barbosa da. Estudo comparativo da influência de sais inorgânicos e estabilizadores amínicos bloqueados (HAS) nas propriedades do PMMA e do PVC expostos à radiação Gama .

Degree: 2009, Universidade Federal de Pernambuco

URL: http://repositorio.ufpe.br/handle/123456789/9842

► Os polímeros PMMA e PVC fabricados no Brasil são utilizados na confecção de artefatos médico-farmacêutico esterilizáveis por radiação ionizante. Contudo, quando esses polímeros são expostos… (more)

▼ Os polímeros PMMA e PVC fabricados no Brasil são utilizados na confecção de artefatos médico-farmacêutico esterilizáveis por radiação ionizante. Contudo, quando esses polímeros são expostos à radiação gama, podem sofrer alterações na sua cadeia principal. Tais alterações acarretam em degradação molecular e conseqüente mudanças nas suas propriedades físicas. Portanto, a estabilização radiolítica do PMMA e do PVC torna-se fundamental para viabilização desses polímeros na fabricação de artefatos radioesterilizáveis. Neste estudo foram testados dois estabilizantes, um aditivo comercial tipo HAS (Hindered Amine Stabilizer) originalmente utilizado na estabilização foto-oxidativa de polímeros e uma mistura de sais inorgânicos (CuCl2/KI) estudada previamente na estabilização termo-oxidativa de sistemas poliméricos. Os resultados encontrados para os sistemas com PMMA mostraram que o HAS incorporado ao sistema na concentração de 0,3% (m/m) confere uma radioproteção de 61%. Este resultado significa uma redução do valor G (cisões/100eV) de 1,23 para 0,48 no intervalo de 0 a 100kGy. Ensaios térmicos mostraram que o HAS na concentração de 0,3% (m/m) também contribui para a estabilização térmica do PMMA. Por outro lado, nenhuma concentração da mistura de sais mostrou-se eficiente na estabilização radiolítica do PMMA. Para os sistemas baseados no PVC, o HAS não apresentou nenhuma ação estabilizante, provavelmente pela ação do HCl liberado na radiólise da matriz polimérica. O sistema com a mistura de sais apresentou o mesmo comportamento de degradação radiolítica do que o sistema controle, contudo a mistura de sais na concentração de 0,5% (m/m) conferiu uma melhora nas propriedades térmicas do PVC, aumentando em 44°C a temperatura de máxima degradação térmica (liberação de HCl) do polímero. Os ensaios mecânicos realizados para os sistemas de PMMA e PVC indicaram que a mistura de sais foi o estabilizante que mais influenciou nas propriedades mecânicas dos polímeros, com destaque na propriedade módulo de elasticidade que para o PVC aumentou em 23% quando comparado com o PVC-controle. Por outro lado, o PMMA-sais tem seu módulo de elasticidade aumentado em 36% em relação ao PMMA-controle. As análises espectroscópicas na região do infravermelho (FT-IR) mostraram que a presença dos estabilizantes (HAS e CuCl2/KI) nos sistemas de PMMA e PVC não modificaram suas estruturas Advisors/Committee Members: ARAÚJO, Elmo Silvano de (advisor).

Subjects/Keywords: Radiação gama; PVC; PMMA; Estabilização; Aditivos

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

APA (6^th Edition):

SILVA, W. B. d. (2009). Estudo comparativo da influência de sais inorgânicos e estabilizadores amínicos bloqueados (HAS) nas propriedades do PMMA e do PVC expostos à radiação Gama . (Thesis). Universidade Federal de Pernambuco. Retrieved from http://repositorio.ufpe.br/handle/123456789/9842

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):

SILVA, William Barbosa da. “Estudo comparativo da influência de sais inorgânicos e estabilizadores amínicos bloqueados (HAS) nas propriedades do PMMA e do PVC expostos à radiação Gama .” 2009. Thesis, Universidade Federal de Pernambuco. Accessed October 01, 2020. http://repositorio.ufpe.br/handle/123456789/9842.

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

MLA Handbook (7^th Edition):

SILVA, William Barbosa da. “Estudo comparativo da influência de sais inorgânicos e estabilizadores amínicos bloqueados (HAS) nas propriedades do PMMA e do PVC expostos à radiação Gama .” 2009. Web. 01 Oct 2020.

Vancouver:

SILVA WBd. Estudo comparativo da influência de sais inorgânicos e estabilizadores amínicos bloqueados (HAS) nas propriedades do PMMA e do PVC expostos à radiação Gama . [Internet] [Thesis]. Universidade Federal de Pernambuco; 2009. [cited 2020 Oct 01]. Available from: http://repositorio.ufpe.br/handle/123456789/9842.

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

Council of Science Editors:

SILVA WBd. Estudo comparativo da influência de sais inorgânicos e estabilizadores amínicos bloqueados (HAS) nas propriedades do PMMA e do PVC expostos à radiação Gama . [Thesis]. Universidade Federal de Pernambuco; 2009. Available from: http://repositorio.ufpe.br/handle/123456789/9842

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

23. Caetano, Francisca Fiadeiro Carreira. Cimentos ósseos acrílicos e a sua aplicação em cirurgia ortopédica.

Degree: 2014, RCAAP

URL: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/13044

►

Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz

Os biomateriais, de uma forma geral, são tudo aquilo… (more)

Subjects/Keywords: Biomateriais; Cimento ósseo; PMMA; Cirurgia ortopédica

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APA (6^th Edition):

Caetano, F. F. C. (2014). Cimentos ósseos acrílicos e a sua aplicação em cirurgia ortopédica. (Thesis). RCAAP. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/13044

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):

Caetano, Francisca Fiadeiro Carreira. “Cimentos ósseos acrílicos e a sua aplicação em cirurgia ortopédica.” 2014. Thesis, RCAAP. Accessed October 01, 2020. https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/13044.

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

MLA Handbook (7^th Edition):

Caetano, Francisca Fiadeiro Carreira. “Cimentos ósseos acrílicos e a sua aplicação em cirurgia ortopédica.” 2014. Web. 01 Oct 2020.

Vancouver:

Caetano FFC. Cimentos ósseos acrílicos e a sua aplicação em cirurgia ortopédica. [Internet] [Thesis]. RCAAP; 2014. [cited 2020 Oct 01]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/13044.

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

Council of Science Editors:

Caetano FFC. Cimentos ósseos acrílicos e a sua aplicação em cirurgia ortopédica. [Thesis]. RCAAP; 2014. Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/13044

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

Missouri University of Science and Technology

24. Zhang, Bing. Thermal behavior of thin-polymer films on silica.

Degree: PhD, Chemistry, Missouri University of Science and Technology

URL: https://scholarsmine.mst.edu/doctoral_dissertations/1491

"The surface properties of homo-poly(methyl methacrylate) (PMMA) and polystyrene-fandom-poly(methyl methacrylate) (PS-r-PMMA) copolymers were studied using modulated differential scanning calorimetry (MDSC), thermogravimetric analysis (TGA) and Fourier transformed infrared spectroscopy (FT-IR)" – Abstract, page iv.

Subjects/Keywords: Degradation; PMMA; Chemistry

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

APA (6^th Edition):

Zhang, B. (n.d.). Thermal behavior of thin-polymer films on silica. (Doctoral Dissertation). Missouri University of Science and Technology. Retrieved from https://scholarsmine.mst.edu/doctoral_dissertations/1491

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Chicago Manual of Style (16^th Edition):

Zhang, Bing. “Thermal behavior of thin-polymer films on silica.” Doctoral Dissertation, Missouri University of Science and Technology. Accessed October 01, 2020. https://scholarsmine.mst.edu/doctoral_dissertations/1491.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

MLA Handbook (7^th Edition):

Zhang, Bing. “Thermal behavior of thin-polymer films on silica.” Web. 01 Oct 2020.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Zhang B. Thermal behavior of thin-polymer films on silica. [Internet] [Doctoral dissertation]. Missouri University of Science and Technology; [cited 2020 Oct 01]. Available from: https://scholarsmine.mst.edu/doctoral_dissertations/1491.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Council of Science Editors:

Zhang B. Thermal behavior of thin-polymer films on silica. [Doctoral Dissertation]. Missouri University of Science and Technology; Available from: https://scholarsmine.mst.edu/doctoral_dissertations/1491

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Universidade do Rio Grande do Norte

25. Silva, Erik dos Santos. Efeito da incorporação de sílica tratada com aminosilano nos nanocompósitos PMMA/SAN/Sílica .

Degree: 2017, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/24640

► Research on nanocomposites of polymers and silica has become the focus of many researchers in recent years because of the excellent properties presented when compared… (more)

Subjects/Keywords: APTES; Blenda PMMA/SAN; Nanocompósitos; Sílica

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APA (6^th Edition):

Silva, E. d. S. (2017). Efeito da incorporação de sílica tratada com aminosilano nos nanocompósitos PMMA/SAN/Sílica . (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/24640

Chicago Manual of Style (16^th Edition):

Silva, Erik dos Santos. “Efeito da incorporação de sílica tratada com aminosilano nos nanocompósitos PMMA/SAN/Sílica .” 2017. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed October 01, 2020. http://repositorio.ufrn.br/handle/123456789/24640.

MLA Handbook (7^th Edition):

Silva, Erik dos Santos. “Efeito da incorporação de sílica tratada com aminosilano nos nanocompósitos PMMA/SAN/Sílica .” 2017. Web. 01 Oct 2020.

Vancouver:

Silva EdS. Efeito da incorporação de sílica tratada com aminosilano nos nanocompósitos PMMA/SAN/Sílica . [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2017. [cited 2020 Oct 01]. Available from: http://repositorio.ufrn.br/handle/123456789/24640.

Council of Science Editors:

Silva EdS. Efeito da incorporação de sílica tratada com aminosilano nos nanocompósitos PMMA/SAN/Sílica . [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/24640

University of Debrecen

26. Rouzbeh, Karimi. Antibiotic beads and osteomyelitis .

Degree: DE – Általános Orvostudományi Kar, University of Debrecen

URL: http://hdl.handle.net/2437/218629

► The local delivery of antibiotics in the treatment of osteomyelitis has been used safely and effectively for decades. Over the past 30 years the main… (more)

Subjects/Keywords: Antibioticbeads; Osteomyelitis; PMMA

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

APA (6^th Edition):

Rouzbeh, K. (n.d.). Antibiotic beads and osteomyelitis . (Thesis). University of Debrecen. Retrieved from http://hdl.handle.net/2437/218629

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rouzbeh, Karimi. “Antibiotic beads and osteomyelitis .” Thesis, University of Debrecen. Accessed October 01, 2020. http://hdl.handle.net/2437/218629.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rouzbeh, Karimi. “Antibiotic beads and osteomyelitis .” Web. 01 Oct 2020.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Rouzbeh K. Antibiotic beads and osteomyelitis . [Internet] [Thesis]. University of Debrecen; [cited 2020 Oct 01]. Available from: http://hdl.handle.net/2437/218629.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Rouzbeh K. Antibiotic beads and osteomyelitis . [Thesis]. University of Debrecen; Available from: http://hdl.handle.net/2437/218629

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Luleå University of Technology

27. Hultberg, Gustav. Ignition Temperatures of MDF-board and PMMA : Measurements and Numerical Calculations.

Degree: 2014, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42531

►

The ignition temperature for a material is not clearly defined throughout the fire-research community. To search for the ignition temperature of for example wood… (more)

Subjects/Keywords: Technology; Teknik; Antändningstemperatur; MDF; PMMA; Konkalorimeter; Värmestrålning

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

APA (6^th Edition):

Hultberg, G. (2014). Ignition Temperatures of MDF-board and PMMA : Measurements and Numerical Calculations. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42531

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):

Hultberg, Gustav. “Ignition Temperatures of MDF-board and PMMA : Measurements and Numerical Calculations.” 2014. Thesis, Luleå University of Technology. Accessed October 01, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42531.

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

MLA Handbook (7^th Edition):

Hultberg, Gustav. “Ignition Temperatures of MDF-board and PMMA : Measurements and Numerical Calculations.” 2014. Web. 01 Oct 2020.

Vancouver:

Hultberg G. Ignition Temperatures of MDF-board and PMMA : Measurements and Numerical Calculations. [Internet] [Thesis]. Luleå University of Technology; 2014. [cited 2020 Oct 01]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42531.

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

Council of Science Editors:

Hultberg G. Ignition Temperatures of MDF-board and PMMA : Measurements and Numerical Calculations. [Thesis]. Luleå University of Technology; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42531

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

Uppsala University

28. Mujo, Martin Zarazua. In-vitro study of antibiotic and strontium release from hydroxyapatite spheres and its PMMA composite.

Degree: Applied Materials Sciences, 2011, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159541

► The aim of this project was to study the in vitro release of cephalothin, vancomycin and strontium from hydroxyapatite particles and its PMMA composite.… (more)

Subjects/Keywords: In vitro; antibiotic; strontium; hydroxyapatite; PMMA

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

APA (6^th Edition):

Mujo, M. Z. (2011). In-vitro study of antibiotic and strontium release from hydroxyapatite spheres and its PMMA composite. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159541

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):

Mujo, Martin Zarazua. “In-vitro study of antibiotic and strontium release from hydroxyapatite spheres and its PMMA composite.” 2011. Thesis, Uppsala University. Accessed October 01, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159541.

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

MLA Handbook (7^th Edition):

Mujo, Martin Zarazua. “In-vitro study of antibiotic and strontium release from hydroxyapatite spheres and its PMMA composite.” 2011. Web. 01 Oct 2020.

Vancouver:

Mujo MZ. In-vitro study of antibiotic and strontium release from hydroxyapatite spheres and its PMMA composite. [Internet] [Thesis]. Uppsala University; 2011. [cited 2020 Oct 01]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159541.

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

Council of Science Editors:

Mujo MZ. In-vitro study of antibiotic and strontium release from hydroxyapatite spheres and its PMMA composite. [Thesis]. Uppsala University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159541

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

29. Ferreri, Loredana. Sintesi e caratterizzazione di copolimeri a base di poliaddizionati ottenuti mediante Polimerizzazione Radicalica Vivente.

Degree: 2011, Università degli Studi di Catania

URL: http://hdl.handle.net/10761/120

►

Negli ultimi anni i copolimeri a blocchi hanno acquistato sempre maggiore interesse sia da un punto di vista accademico che industriale grazie alle loro potenziali… (more)

▼

Negli ultimi anni i copolimeri a blocchi hanno acquistato sempre maggiore interesse sia da un punto di vista accademico che industriale grazie alle loro potenziali applicazioni come membrane per la separazione di gas, come compatibilizzanti di miscele polimeriche e nel campo del nanopatterning. Il Bisfenolo A policarbonato (PC) ed il polimetilmetacrilato (PMMA) rappresentano importanti tecnopolimeri e trovano impiego in svariati campi di applicazione quali: ottico, automobilistico, elettronico, arredamento e costruzioni per questo motivo risulta auspicabile l'ottenimento di copolimeri a blocchi PC/PMMA. E' stato sintetizzato il prepolimero (PC-2OH) terminato con gruppi bis-fenolici ad entrambi i lati della catena, il quale e' stato funzionalizzato mediante 2-bromoisobutiril bromuro e a-clorofenilacetil cloruro al fine di ottenere i macroiniziatori PCBr e PCCl. I macroinizatori sono stati poi utilizzati per la sintesi di copolimeri a blocchi PMMA-b-PC-b-PMMA mediante Polimerizzazione Radicalica Vivente. Sono stati sintetizzati tre copolimeri a rapporti molari PC/MMA diversi: (1:1000), (1:500), (1:100). Il prepolimero, i macroiniziatori, ed i copolimeri ottenuti sono stati caratterizzati mediante NMR,SEC, DSC, TGA e MALDI-TOF, AFM e SEM. I risultati prodotti da questo lavoro di ricerca hanno permesso di ottimizzare i parametri di reazione sia per la sintesi del PC-2OH che dei macroiniziatori e di sintetizzare e caratterizzare copolimeri di e triblocco mediante ATRP in merito ai quali ad oggi non sono presenti molti riferimenti bibliografici.

During the last decades block copolymers have gained more interest from both academic and industrial point of view because of their potential applications as membranes for gas separation, as compatibilizers in polymer blends and for nano-patterning. Bisphenol A polycarbonate (PC) and polymethylmethacrylate (PMMA) are important engineering plastics used in several applications such as optical, automotive, electronics, furniture and construction. Considering their properties it is advantageous to obtain block copolymers of PC/PMMA. It was synthesized prepolymer (PC-2OH) terminated with bis-phenol groups at both ends of the chain, which has been functionalized by 2-bromoisobutiril bromide and a-clorofenilacetil chloride in order to obtain the macroiniziators PCBr and PCCl. These macroinizators were then used for the synthesis of block copolymers PMMA-b-PC-b-PMMA by Living Radical Polymerization (ATRP). Three copolymers were synthesized in different (1:1000) (1:500) (1:100) molar ratios of PC/MMA. The prepolymer, the macroiniziators, and the copolymers obtained were characterized by NMR, SEC, DSC, TGA,MALDI-TOF, AFM and SEM. The results of this research have allowed us to optimize the reaction parameters for both the synthesis of PC-2OH and the macroiniziators and to synthesize and characterize di- and tri-block copolymers.

Subjects/Keywords: Copolimeri a blocchi; ATRP; PC; PMMA

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

APA (6^th Edition):

Ferreri, L. (2011). Sintesi e caratterizzazione di copolimeri a base di poliaddizionati ottenuti mediante Polimerizzazione Radicalica Vivente. (Thesis). Università degli Studi di Catania. Retrieved from http://hdl.handle.net/10761/120

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):

Ferreri, Loredana. “Sintesi e caratterizzazione di copolimeri a base di poliaddizionati ottenuti mediante Polimerizzazione Radicalica Vivente.” 2011. Thesis, Università degli Studi di Catania. Accessed October 01, 2020. http://hdl.handle.net/10761/120.

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

MLA Handbook (7^th Edition):

Ferreri, Loredana. “Sintesi e caratterizzazione di copolimeri a base di poliaddizionati ottenuti mediante Polimerizzazione Radicalica Vivente.” 2011. Web. 01 Oct 2020.

Vancouver:

Ferreri L. Sintesi e caratterizzazione di copolimeri a base di poliaddizionati ottenuti mediante Polimerizzazione Radicalica Vivente. [Internet] [Thesis]. Università degli Studi di Catania; 2011. [cited 2020 Oct 01]. Available from: http://hdl.handle.net/10761/120.

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

Council of Science Editors:

Ferreri L. Sintesi e caratterizzazione di copolimeri a base di poliaddizionati ottenuti mediante Polimerizzazione Radicalica Vivente. [Thesis]. Università degli Studi di Catania; 2011. Available from: http://hdl.handle.net/10761/120

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

Universitat de Valencia

30. Martínez Moreno, Javier. Evaluación de la liberación de antibióticos incorporados en cementos utilizados en artroplastia .

Degree: 2017, Universitat de Valencia

URL: http://hdl.handle.net/10550/62925

► Una de las complicaciones más serias de la artroplastia se encuentra asociada con el desarrollo de una infección, que, aunque la prevalencia de sitúa entre… (more)

Subjects/Keywords: PMMA; ciprofloxacino; vancomicina; ceftazidima; fluconazol; artroplastia

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

APA (6^th Edition):

Martínez Moreno, J. (2017). Evaluación de la liberación de antibióticos incorporados en cementos utilizados en artroplastia . (Doctoral Dissertation). Universitat de Valencia. Retrieved from http://hdl.handle.net/10550/62925

Chicago Manual of Style (16^th Edition):

Martínez Moreno, Javier. “Evaluación de la liberación de antibióticos incorporados en cementos utilizados en artroplastia .” 2017. Doctoral Dissertation, Universitat de Valencia. Accessed October 01, 2020. http://hdl.handle.net/10550/62925.

MLA Handbook (7^th Edition):

Martínez Moreno, Javier. “Evaluación de la liberación de antibióticos incorporados en cementos utilizados en artroplastia .” 2017. Web. 01 Oct 2020.

Vancouver:

Martínez Moreno J. Evaluación de la liberación de antibióticos incorporados en cementos utilizados en artroplastia . [Internet] [Doctoral dissertation]. Universitat de Valencia; 2017. [cited 2020 Oct 01]. Available from: http://hdl.handle.net/10550/62925.

Council of Science Editors:

Martínez Moreno J. Evaluación de la liberación de antibióticos incorporados en cementos utilizados en artroplastia . [Doctoral Dissertation]. Universitat de Valencia; 2017. Available from: http://hdl.handle.net/10550/62925

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Open Access Theses and Dissertations