subject:(Block copolymers)

Cornell University

1. Park, Jay. Tri-Axial Electrospinning With Block Copolymers And Silica Precursor .

Degree: 2009, Cornell University

► Multi-layered nanofibers have been produced via electrospinning with block copolymer (polystyrene-b-polyisoprene, PS-b-PI) solution sandwiched between innermost and outermost silica precursor layers. The purpose of tri-axial… (more)

▼ Multi-layered nanofibers have been produced via electrospinning with block copolymer (polystyrene-b-polyisoprene, PS-b-PI) solution sandwiched between innermost and outermost silica precursor layers. The purpose of tri-axial approach is to investigate the effect of the interfacial interaction and physical confinement on the self-assembly in electrospun nanofibers. A novel tri-axial electrospinning setup based on a serial connection of two needles with side feeding has been devised first, and PS-b-PI systems of both asymmetric and symmetric morphology with and without surface-modified, magnetite nanoparticles have been studied. The results reveal that confined-assembly is changed significantly by the presence and interaction with both inner and outer silica layers. The incorporation of nanoparticles also revealed that PI phase is wetted against the silica wall, on the contrary to previous reports on PS-b-PI/silica coaxial nanofibers where PS phase is wetted against the silica sheath. The same migration of PI phase to the silica layers has been observed when a blend of pure PS and PS-b-PI was used as a middle layer. To investigate the mechanics behind confinement and wall interaction, coarse-grained molecular dynamics (MD) simulation of model symmetric block copolymer (BCP) in cylindrical confinement has been assessed. The simulation results under cylindrical confinement without preference of polymer domains to the wall exhibit stacked lamellae along the fiber axis which was also observed in coaxial electrospun nanofibers of symmetric PS-b-PI. It is also predicted that nanoparticles with selective interaction towards one of BCP domains tend to migrate towards the wall when they are incorporated into BCP under confinement. Multi-layered nanofibers developed in the current study can provide further insights on the effect of confinement and wall interactions on various self-assembly systems including block copolymer-inorganic hybrid materials. The devised tri-axial approach can also be employed to fabricate multi-layered, multi-structured nanofibers for high end applications such as drug delivery.

Subjects/Keywords: Block Copolymers

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APA (6^th Edition):

Park, J. (2009). Tri-Axial Electrospinning With Block Copolymers And Silica Precursor . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/13762

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):

Park, Jay. “Tri-Axial Electrospinning With Block Copolymers And Silica Precursor .” 2009. Thesis, Cornell University. Accessed August 19, 2017. http://hdl.handle.net/1813/13762.

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

MLA Handbook (7^th Edition):

Park, Jay. “Tri-Axial Electrospinning With Block Copolymers And Silica Precursor .” 2009. Web. 19 Aug 2017.

Vancouver:

Park J. Tri-Axial Electrospinning With Block Copolymers And Silica Precursor . [Internet] [Thesis]. Cornell University; 2009. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/1813/13762.

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

Council of Science Editors:

Park J. Tri-Axial Electrospinning With Block Copolymers And Silica Precursor . [Thesis]. Cornell University; 2009. Available from: http://hdl.handle.net/1813/13762

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

Clemson University

2. Wickramasinghe, Anuradhi Nimesha Kumari. Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films.

Degree: MS, Chemistry, 2017, Clemson University

URL: http://tigerprints.clemson.edu/all_theses/2687

► This work focuses on the association of a structured multifunctional co-polymer in solutions and thin films as studied using neutron techniques and atomic force microscopy.… (more)

▼ This work focuses on the association of a structured multifunctional co-polymer in solutions and thin films as studied using neutron techniques and atomic force microscopy. Tethering multiple blocks into structured architectures is a promising way to tailor block copolymers with well-defined properties. Polymer films are often cast from solutions. Therefore, understanding the association of complex polymers in solutions and the impact of the aggregates into thin films is crucial to design materials with well-defined properties. Ionically-decorated blocks facilitate transport of ions and response to electrical fields. However they also affect the polymer structure. This work is divided into two sections. The first one resolves aggregation of a symmetric van der Waals pentablock polymer in solutions. The second follows film structure as charged groups are introduced. Specifically, we probed the assembly of polymers having an A-B-C-B-A co-polymer architecture, where co-polymer C is polystyrene, B is hydrogenated poly (ethylene-r-propylene) and A is poly (t-butyl styrene). In solutions we studied non-ionic pentablock polymers and in thin films we studied ionic pentablock polymers. In the solution study, the solvent polarity was tuned by controlling the ratio of cyclohexane to propanol. We find that, in contrast to most block copolymers, this pentablock polymer associates into fractal aggregates in cyclohexane which become more self-similar with increasing temperature. Increasing solvent polarity, by addition of propanol, drives the collapse of pentablock chains which leads the formation of more spherical aggregates. The structured architecture of the pentablock polymer enhances entropy resulting in less well-defined shapes that are maintained over a broad temperature range. In thin films, we probed the ionic analog of the above co-polymer where C is a randomly sulfonated polystyrene with sulfonation fractions of 0, 26 and 52 mole %, as the sulfonation level and thermal annealing times are varied using atomic force microscopy, surface tension measurements and neutron reflectivity. Our results show that as cast films form layers with both hydrophobic blocks dominating the solid and air interfaces and the ionizable block segregates to the center. With annealing at 170Â°C, above Tg of styrene sulfonate, the films coarsen, with surface aggregation dominating the structure, though interfacial regions remain dominated by the hydrophobic segments. Advisors/Committee Members: Dr. Dvora Perahia, Committee Chair, Dr. Stephen Creager, Dr. Rhett Smith.

Subjects/Keywords: block copolymers

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APA (6^th Edition):

Wickramasinghe, A. N. K. (2017). Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films. (Masters Thesis). Clemson University. Retrieved from http://tigerprints.clemson.edu/all_theses/2687

Chicago Manual of Style (16^th Edition):

Wickramasinghe, Anuradhi Nimesha Kumari. “Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films.” 2017. Masters Thesis, Clemson University. Accessed August 19, 2017. http://tigerprints.clemson.edu/all_theses/2687.

MLA Handbook (7^th Edition):

Wickramasinghe, Anuradhi Nimesha Kumari. “Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films.” 2017. Web. 19 Aug 2017.

Vancouver:

Wickramasinghe ANK. Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films. [Internet] [Masters thesis]. Clemson University; 2017. [cited 2017 Aug 19]. Available from: http://tigerprints.clemson.edu/all_theses/2687.

Council of Science Editors:

Wickramasinghe ANK. Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films. [Masters Thesis]. Clemson University; 2017. Available from: http://tigerprints.clemson.edu/all_theses/2687

Cornell University

3. Kamperman, Maria Magdalena Gerdina. Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases .

Degree: 2008, Cornell University

URL: http://hdl.handle.net/1813/11162

► Nanostructured high-temperature ceramics offer great promise in various applications, because of their excellent thermal stability and mechanical properties. Despite advances in oxide materials, nanostructuring of… (more)

Subjects/Keywords: block copolymers; nanocomposites

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APA (6^th Edition):

Kamperman, M. M. G. (2008). Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/11162

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):

Kamperman, Maria Magdalena Gerdina. “Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases .” 2008. Thesis, Cornell University. Accessed August 19, 2017. http://hdl.handle.net/1813/11162.

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

MLA Handbook (7^th Edition):

Kamperman, Maria Magdalena Gerdina. “Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases .” 2008. Web. 19 Aug 2017.

Vancouver:

Kamperman MMG. Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases . [Internet] [Thesis]. Cornell University; 2008. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/1813/11162.

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

Council of Science Editors:

Kamperman MMG. Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases . [Thesis]. Cornell University; 2008. Available from: http://hdl.handle.net/1813/11162

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

Universidad de Chile

4. Leiva, Angel. Monolayers and Thin Films of Dextran Hydrophobically Modified .

Degree: 2010, Universidad de Chile

URL: http://www.captura.uchile.cl/handle/2250/11128

► Foram sintetizados uma série de copolímeros enxertados biodegradáveis pelo enxerto da e-captolactona sobre dextrana de diferentes pesos moleculares. Os polímeros obtidos foram caracterizados por infravermelho… (more)

Subjects/Keywords: dextran; e-caprolactone; block copolymers; biodegradable; copolymers

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APA (6^th Edition):

Leiva, A. (2010). Monolayers and Thin Films of Dextran Hydrophobically Modified . (Thesis). Universidad de Chile. Retrieved from http://www.captura.uchile.cl/handle/2250/11128

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):

Leiva, Angel. “Monolayers and Thin Films of Dextran Hydrophobically Modified .” 2010. Thesis, Universidad de Chile. Accessed August 19, 2017. http://www.captura.uchile.cl/handle/2250/11128.

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

MLA Handbook (7^th Edition):

Leiva, Angel. “Monolayers and Thin Films of Dextran Hydrophobically Modified .” 2010. Web. 19 Aug 2017.

Vancouver:

Leiva A. Monolayers and Thin Films of Dextran Hydrophobically Modified . [Internet] [Thesis]. Universidad de Chile; 2010. [cited 2017 Aug 19]. Available from: http://www.captura.uchile.cl/handle/2250/11128.

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

Council of Science Editors:

Leiva A. Monolayers and Thin Films of Dextran Hydrophobically Modified . [Thesis]. Universidad de Chile; 2010. Available from: http://www.captura.uchile.cl/handle/2250/11128

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

Cornell University

5. Pinge, Shubham. Mesoscale Modeling Of Directed Self Assemblies Of Block Copolymer Lithography .

Degree: 2016, Cornell University

URL: http://hdl.handle.net/1813/43701

► Block copolymers (BCPs) self organize at molecular level building blocks and forming nano-structures with characteristic length scales. As these nano-structures resemble the lithographic features desired… (more)

Subjects/Keywords: Block Copolymers; Lithography; Molecular Dynamics

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APA (6^th Edition):

Pinge, S. (2016). Mesoscale Modeling Of Directed Self Assemblies Of Block Copolymer Lithography . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/43701

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):

Pinge, Shubham. “Mesoscale Modeling Of Directed Self Assemblies Of Block Copolymer Lithography .” 2016. Thesis, Cornell University. Accessed August 19, 2017. http://hdl.handle.net/1813/43701.

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

MLA Handbook (7^th Edition):

Pinge, Shubham. “Mesoscale Modeling Of Directed Self Assemblies Of Block Copolymer Lithography .” 2016. Web. 19 Aug 2017.

Vancouver:

Pinge S. Mesoscale Modeling Of Directed Self Assemblies Of Block Copolymer Lithography . [Internet] [Thesis]. Cornell University; 2016. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/1813/43701.

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

Council of Science Editors:

Pinge S. Mesoscale Modeling Of Directed Self Assemblies Of Block Copolymer Lithography . [Thesis]. Cornell University; 2016. Available from: http://hdl.handle.net/1813/43701

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

University of Adelaide

6. Girolamo, Mario. Physicochemical study of poly (isoprene:styrene) block copolymers.

Degree: 1971, University of Adelaide

URL: http://hdl.handle.net/2440/20088

Subjects/Keywords: Block copolymers.

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APA (6^th Edition):

Girolamo, M. (1971). Physicochemical study of poly (isoprene:styrene) block copolymers. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/20088

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):

Girolamo, Mario. “Physicochemical study of poly (isoprene:styrene) block copolymers.” 1971. Thesis, University of Adelaide. Accessed August 19, 2017. http://hdl.handle.net/2440/20088.

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

MLA Handbook (7^th Edition):

Girolamo, Mario. “Physicochemical study of poly (isoprene:styrene) block copolymers.” 1971. Web. 19 Aug 2017.

Vancouver:

Girolamo M. Physicochemical study of poly (isoprene:styrene) block copolymers. [Internet] [Thesis]. University of Adelaide; 1971. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2440/20088.

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

Council of Science Editors:

Girolamo M. Physicochemical study of poly (isoprene:styrene) block copolymers. [Thesis]. University of Adelaide; 1971. Available from: http://hdl.handle.net/2440/20088

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

University of Adelaide

7. Lawry, Peter Sheldon. An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition / Peter Sheldon Lawry.

Degree: 1966, University of Adelaide

URL: http://hdl.handle.net/2440/20971

Subjects/Keywords: Block copolymers.

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APA (6^th Edition):

Lawry, P. S. (1966). An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition / Peter Sheldon Lawry. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/20971

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):

Lawry, Peter Sheldon. “An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition / Peter Sheldon Lawry.” 1966. Thesis, University of Adelaide. Accessed August 19, 2017. http://hdl.handle.net/2440/20971.

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

MLA Handbook (7^th Edition):

Lawry, Peter Sheldon. “An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition / Peter Sheldon Lawry.” 1966. Web. 19 Aug 2017.

Vancouver:

Lawry PS. An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition / Peter Sheldon Lawry. [Internet] [Thesis]. University of Adelaide; 1966. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2440/20971.

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

Council of Science Editors:

Lawry PS. An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition / Peter Sheldon Lawry. [Thesis]. University of Adelaide; 1966. Available from: http://hdl.handle.net/2440/20971

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

University of Adelaide

8. Urwin, John Robson. Block copolymers / by J.R. Urwin.

Degree: 1972, University of Adelaide

URL: http://hdl.handle.net/2440/38582

Subjects/Keywords: Block copolymers.

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APA (6^th Edition):

Urwin, J. R. (1972). Block copolymers / by J.R. Urwin. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/38582

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):

Urwin, John Robson. “Block copolymers / by J.R. Urwin.” 1972. Thesis, University of Adelaide. Accessed August 19, 2017. http://hdl.handle.net/2440/38582.

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

MLA Handbook (7^th Edition):

Urwin, John Robson. “Block copolymers / by J.R. Urwin.” 1972. Web. 19 Aug 2017.

Vancouver:

Urwin JR. Block copolymers / by J.R. Urwin. [Internet] [Thesis]. University of Adelaide; 1972. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2440/38582.

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

Council of Science Editors:

Urwin JR. Block copolymers / by J.R. Urwin. [Thesis]. University of Adelaide; 1972. Available from: http://hdl.handle.net/2440/38582

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

University of Texas – Austin

9. Shah, Manas Ravindra. Modeling self-assembly and structure-property relationships in block copolymers.

Degree: 2009, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2009-12-413

► Block copolymers have been subject of tremendous research interest owing to their capability of undergoing self-assembly which allows them to tailor their electrical, optical, and… (more)

Subjects/Keywords: block copolymers; photovoltaic properties; modeling

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APA (6^th Edition):

Shah, M. R. (2009). Modeling self-assembly and structure-property relationships in block copolymers. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2009-12-413

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):

Shah, Manas Ravindra. “Modeling self-assembly and structure-property relationships in block copolymers.” 2009. Thesis, University of Texas – Austin. Accessed August 19, 2017. http://hdl.handle.net/2152/ETD-UT-2009-12-413.

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

MLA Handbook (7^th Edition):

Shah, Manas Ravindra. “Modeling self-assembly and structure-property relationships in block copolymers.” 2009. Web. 19 Aug 2017.

Vancouver:

Shah MR. Modeling self-assembly and structure-property relationships in block copolymers. [Internet] [Thesis]. University of Texas – Austin; 2009. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2152/ETD-UT-2009-12-413.

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

Council of Science Editors:

Shah MR. Modeling self-assembly and structure-property relationships in block copolymers. [Thesis]. University of Texas – Austin; 2009. Available from: http://hdl.handle.net/2152/ETD-UT-2009-12-413

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

Penn State University

10. Moore, Hunter David. MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS.

Degree: MS, Materials Science and Engineering, 2011, Penn State University

URL: https://etda.libraries.psu.edu/catalog/11786

► Ion-containing polymers are an interesting subset of polymeric materials with applications in structural materials, water treatment, energy storage, and energy conversion. Within this class of… (more)

▼ Ion-containing polymers are an interesting subset of polymeric materials with applications in structural materials, water treatment, energy storage, and energy conversion. Within this class of polymers, ion-containing block copolymers hold promise in advancing our understanding of the structure-property relationships of water-absorbing, ion-containing membranes through their unique ability to form tunable ionic domain morphologies. Non-ionic block copolymers have been studied extensively and the theory of how their nanophase structure is formed and the experimental methods for probing their phase behavior are well-documented in the literature. However, the addition of ions to these systems may change the traditional descriptors of phase formation in block copolymers by introducing strong electrostatic or hydrogen bonding interactions into one of the blocks. Therefore, much attention has recently been given to the study of how the chemical composition and ion content of ion-containing block polymers affect their morphology. These studies of phase formation, combined with work on how the microphase separated morphology affects transport properties, e.g. ion conductivity, will help to advance the design of next-generation, ion-containing block copolymer membranes for ion and water transport applications. The focus of this thesis is to elucidate the phase behavior and ion transport properties of sulfonated and quaternary ammonium-containing triblock copolymers. The polymers studied in this work are sulfonated poly(hexyl methacrylate)-b¬-poly(styrene)-b-poly(hexyl methacrylate) [PHMA-SPS-PHMA], sulfonated poly(perfluorooctyl methacrylate)-b¬-poly(styrene)-b-poly(perfluorooctyl methacrylate) [PFMA-SPS-PFMA], and quaternary ammonium functionalized poly(styrene)-b¬-poly(ethylene/butylene)-b-poly(styrene) [QA-SEBS]. In particular, the work presented here describes the investigation of the effect of functionalizing the midblock of the sulfonated triblock copolymers with the idea that the hydrophobic endblocks will help to increase mechanical stability of the film when the polymer is introduced to humidity. This study also investigated how the morphology of end-block functionalized quaternary-ammonium containing triblock copolymers change when introduced to varying levels of humidity. Small angle x-ray scattering and transmission electron micrography were used to quantitatively probe the morphology of the samples. Water uptake and impedance spectroscopy provided information on the transport properties of these samples. Comparisons are drawn between samples with different levels of functionalization and some comments are made on the basic mechanisms of phase formation in sulfonated and quaternary-ammonium containing block copolymers. In the study of midblock functionalization, two different endblocks, poly(hexyl methacrylate) and poly(perfluorooctyl methacrylate), were chosen to observe how the hydrophobic portion of the polymer affected the morphology and conductivity of the membranes. Fluorinated PFMA endblocks produced…

Subjects/Keywords: ion-containing polymers; block copolymers

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APA (6^th Edition):

Moore, H. D. (2011). MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11786

Chicago Manual of Style (16^th Edition):

Moore, Hunter David. “MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS.” 2011. Masters Thesis, Penn State University. Accessed August 19, 2017. https://etda.libraries.psu.edu/catalog/11786.

MLA Handbook (7^th Edition):

Moore, Hunter David. “MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS.” 2011. Web. 19 Aug 2017.

Vancouver:

Moore HD. MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS. [Internet] [Masters thesis]. Penn State University; 2011. [cited 2017 Aug 19]. Available from: https://etda.libraries.psu.edu/catalog/11786.

Council of Science Editors:

Moore HD. MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS. [Masters Thesis]. Penn State University; 2011. Available from: https://etda.libraries.psu.edu/catalog/11786

University of Texas – Austin

11. Blachut, Gregory. Design of silicon-containing block copolymer materials for applications in lithography.

Degree: Chemical Engineering, 2017, University of Texas – Austin

URL: http://hdl.handle.net/2152/46239

► Continual advancement in microelectronic performance has made microelectronics essentially ubiquitous, enriching modern life in ways unimaginable even a few decades ago. The advancement in microelectronic… (more)

▼ Continual advancement in microelectronic performance has made microelectronics essentially ubiquitous, enriching modern life in ways unimaginable even a few decades ago. The advancement in microelectronic devices is made possible by advancements in the manufacturing processes used to make them. Chief among these technologies is lithography, the process by which the individual components on the device are patterned. At present, complex and complicated double-patterning processes are being used to extend the resolution of the lithographic methods used in high-volume manufacturing, but only at great cost. Future generations of microelectronic devices will require even further use of multiple-patterning processes, at which point the economics of manufacturing could prevent the commercialization of such devices. This economic reality has spurred interest in alternative patterning technologies. One of the leading potential methods is to exploit the self-assembly of block copolymers (BCPs). BCPs are a type of polymer consisting of two or more chemically distinct blocks that are covalently joined together. The components of a BCP can phase-separate, and the resultant features form on the 5 to 50 nm length-scale. This size range is coincidentally ideal for next-generation semiconductor devices. However, BCPs on their own do not immediately form device-relevant features. Processes known collectively as directed self-assembly (DSA) are needed to properly guide BCPs. The work in this dissertation focuses on a very specific class of BCPs, those that contain silicon in just one of the blocks. The presence of silicon in the molecule produces many lithographic advantages, but also requires specialized processing steps. Chapter 1 provides an overview of lithography and block copolymer self-assembly. Chapter 2 introduces the materials and techniques needed to control the behavior of silicon-containing BCPs. Chapter 3 presents and characterizes a variety of silicon-containing BCPs. Last, Chapters 4 and 5 describe two implementations of silicon-containing BCP DSA, one for semiconductor patterning, and the other for hard disk drive applications. Advisors/Committee Members: Willson, C. Grant, 1939- (advisor), Ellison, Christopher J. (advisor), Ganesan, Venkat (committee member), Mack, Chris A. (committee member), Akinwande, Deji (committee member).

Subjects/Keywords: Block copolymers; Lithography; Nanolithography

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APA (6^th Edition):

Blachut, G. (2017). Design of silicon-containing block copolymer materials for applications in lithography. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/46239

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):

Blachut, Gregory. “Design of silicon-containing block copolymer materials for applications in lithography.” 2017. Thesis, University of Texas – Austin. Accessed August 19, 2017. http://hdl.handle.net/2152/46239.

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

MLA Handbook (7^th Edition):

Blachut, Gregory. “Design of silicon-containing block copolymer materials for applications in lithography.” 2017. Web. 19 Aug 2017.

Vancouver:

Blachut G. Design of silicon-containing block copolymer materials for applications in lithography. [Internet] [Thesis]. University of Texas – Austin; 2017. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2152/46239.

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

Council of Science Editors:

Blachut G. Design of silicon-containing block copolymer materials for applications in lithography. [Thesis]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/46239

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

University of New South Wales

12. Mason, Alex. Polymersomes as synthetic cell scaffolds.

Degree: Chemistry, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/57315

► Synthetic cell research is aimed at the de novo design of a system that displays all the hallmarks of life metabolism, reproduction, and compartmentalisation. Compartmentalisation,… (more)

▼ Synthetic cell research is aimed at the de novo design of a system that displays all the hallmarks of life metabolism, reproduction, and compartmentalisation. Compartmentalisation, or the separation of a cell or organelle from its outer environment with a lipid bilayer membrane, is key to life in that it enables complex, multi-step reactions to happen in an incredibly efficient manner. For decades, those wanting to mimic natural membranes have turned to liposomes, which are synthetic vesicles comprised of naturally occurring phospholipids. While well understood, liposomes are highly dynamic and thermodynamically unstable. Life is adept at controlling the self-assembly of lipid membranes into highly chemically and structurally asymmetric structures, but without metabolism and the input of energy it is impossible for us to achieve this currently. Polymer vesicles, or polymersomes, are comprised of larger, more inert amphiphilic block copolymers, which allow the generation of new, interesting structures that are thermodynamically stable and allow membrane-bound phenomena to be studied on longer timescales. Of particular interest is the interaction of naturally occurring enzymes with membranes, and the function of transmembrane proteins. This Thesis describes the advancement of the polymersome field for use in synthetic cell research. At the core of this work was the synthesis of a range of amphiphilic di- and triblock copolymers, designed to self-assemble into structures with biomimetic chemical asymmetry to facilitate the incorporation of membrane proteins. The self-assembly behaviour of these polymers was then investigated in a high throughput manner, and several protein bioconjugates were synthesised in order to control several key proteins of the electron transport chain with light. Finally, these naturally occurring proteins were incorporated into polymersomes, creating hybrid protein-polymer systems with structural and functional similarity to the natural mitochondria. Advisors/Committee Members: Thordarson, Pall, Chemistry, Faculty of Science, UNSW.

Subjects/Keywords: Block copolymers; Polymersome; Synthetic cell

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APA (6^th Edition):

Mason, A. (2017). Polymersomes as synthetic cell scaffolds. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/57315

Chicago Manual of Style (16^th Edition):

Mason, Alex. “Polymersomes as synthetic cell scaffolds.” 2017. Doctoral Dissertation, University of New South Wales. Accessed August 19, 2017. http://handle.unsw.edu.au/1959.4/57315.

MLA Handbook (7^th Edition):

Mason, Alex. “Polymersomes as synthetic cell scaffolds.” 2017. Web. 19 Aug 2017.

Vancouver:

Mason A. Polymersomes as synthetic cell scaffolds. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2017 Aug 19]. Available from: http://handle.unsw.edu.au/1959.4/57315.

Council of Science Editors:

Mason A. Polymersomes as synthetic cell scaffolds. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/57315

McMaster University

13. Rahman, Abidur. Shear thinning silicone-PEG block copolymers.

Degree: MSc, 2015, McMaster University

URL: http://hdl.handle.net/11375/16802

►

In this work, we created shear thinning block copolymers that could be potentially utilized as an artificial vitreous replacement. The materials were created using poly(ethylene… (more)

Subjects/Keywords: Silicone; PEG; Block copolymers

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APA (6^th Edition):

Rahman, A. (2015). Shear thinning silicone-PEG block copolymers. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/16802

Chicago Manual of Style (16^th Edition):

Rahman, Abidur. “Shear thinning silicone-PEG block copolymers.” 2015. Masters Thesis, McMaster University. Accessed August 19, 2017. http://hdl.handle.net/11375/16802.

MLA Handbook (7^th Edition):

Rahman, Abidur. “Shear thinning silicone-PEG block copolymers.” 2015. Web. 19 Aug 2017.

Vancouver:

Rahman A. Shear thinning silicone-PEG block copolymers. [Internet] [Masters thesis]. McMaster University; 2015. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/11375/16802.

Council of Science Editors:

Rahman A. Shear thinning silicone-PEG block copolymers. [Masters Thesis]. McMaster University; 2015. Available from: http://hdl.handle.net/11375/16802

Cornell University

14. Robbins, Spencer. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides .

Degree: 2015, Cornell University

URL: http://hdl.handle.net/1813/39425

► Controlling the structure of inorganic materials on the mesoscale (2-50 nm) is desirable for many applications and can influence the materials' properties and performance in… (more)

Subjects/Keywords: block copolymers; mesoporous materials; metal nitrides

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APA (6^th Edition):

Robbins, S. (2015). Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/39425

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):

Robbins, Spencer. “Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides .” 2015. Thesis, Cornell University. Accessed August 19, 2017. http://hdl.handle.net/1813/39425.

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

MLA Handbook (7^th Edition):

Robbins, Spencer. “Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides .” 2015. Web. 19 Aug 2017.

Vancouver:

Robbins S. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides . [Internet] [Thesis]. Cornell University; 2015. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/1813/39425.

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

Council of Science Editors:

Robbins S. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides . [Thesis]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/39425

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

University of Utah

15. Kwon, Young Min. Biodegradable triblock copolymer microspheres for drug delivery based on thermosensitive property of triblock copolymer;.

Degree: PhD, Pharmaceutics & Pharmaceutical Chemistry;, 2003, University of Utah

URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd1/id/561/rec/104

► Extensive research has recently been focused on injectable polymeric drug delivery system for the delivery of bioactive agents such as anticancer agents, proteins, or DNA… (more)

▼ Extensive research has recently been focused on injectable polymeric drug delivery system for the delivery of bioactive agents such as anticancer agents, proteins, or DNA in the form of drug-loaded particulate systems (i.e., microspheres and nanoparticles) for the last decade. Conventional protein-loaded microsphere preparation involves use of water-immiscible organic solvent such as methylene chloride under harsh condition and the resultant microsphere typically exhibits initial burst effect followed by incomplete release of protein drug. An experiment was designed to monitor insulin aggregation induced by water/methylene chloride interface by a turbidimetric method. Insulin at the interface quickly underwent aggregation. This paved the way for a novel approach to prepare biodegradable microspheres without using organic solvent by utilizing unique aqueous sol-gel transition property of triblock copolymer poly(lactic-co-glycolic acid) (PLGA)-PEG-PLGA. A comparative study was carried out using microspheres of the same polymer and drug but prepared by different methods: Msp A (water-based microsphere) and Msp B (w/o/w). Insulin release was carried out in vitro and Msp A showed continuous release over 2 weeks while Msp B exhibited an initial burst effect followed by no release. Circular dichroism (CD) spectroscopy of released insulin demonstrated that insulin from Msp A maintained secondary structure integrity while that from Msp B did not. Confocal microcopy of FITC-labeled insulin showed that fluorescence was homogeneous in Msp A but not homogeneous in Msp B. In an in vivo study using streptozotocin-induced diabetic rats, Msp B exhibited an initial burst release as shown by hypoglycemic shock while Msp A showed less burst and prolonged release for 10 days. The versatility of this triblock copolymer led to the design of an aqueous-based nanoparticle carrier for paclitaxel. Drug-loaded nanoparticle demonstrated control of cultured vascular smooth muscle cell proliferation for potential treatment of restenosis. The unique property of thermosensitive, biodegradable triblock copolymer made it possible to design novel methods of preparing organic solvent-free particulate systems for the delivery of protein and water-insoluble drug.

Subjects/Keywords: Block Copolymers; Drugs

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APA (6^th Edition):

Kwon, Y. M. (2003). Biodegradable triblock copolymer microspheres for drug delivery based on thermosensitive property of triblock copolymer;. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd1/id/561/rec/104

Chicago Manual of Style (16^th Edition):

Kwon, Young Min. “Biodegradable triblock copolymer microspheres for drug delivery based on thermosensitive property of triblock copolymer;.” 2003. Doctoral Dissertation, University of Utah. Accessed August 19, 2017. http://content.lib.utah.edu/cdm/singleitem/collection/etd1/id/561/rec/104.

MLA Handbook (7^th Edition):

Kwon, Young Min. “Biodegradable triblock copolymer microspheres for drug delivery based on thermosensitive property of triblock copolymer;.” 2003. Web. 19 Aug 2017.

Vancouver:

Kwon YM. Biodegradable triblock copolymer microspheres for drug delivery based on thermosensitive property of triblock copolymer;. [Internet] [Doctoral dissertation]. University of Utah; 2003. [cited 2017 Aug 19]. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd1/id/561/rec/104.

Council of Science Editors:

Kwon YM. Biodegradable triblock copolymer microspheres for drug delivery based on thermosensitive property of triblock copolymer;. [Doctoral Dissertation]. University of Utah; 2003. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd1/id/561/rec/104

University of Arizona

16. Johnson, Ralph Leroy, 1945-. Block copolymers .

Degree: 1970, University of Arizona

URL: http://hdl.handle.net/10150/318152

Subjects/Keywords: Block copolymers.; Polymers.

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APA (6^th Edition):

Johnson, Ralph Leroy, 1. (1970). Block copolymers . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/318152

Chicago Manual of Style (16^th Edition):

Johnson, Ralph Leroy, 1945-. “Block copolymers .” 1970. Masters Thesis, University of Arizona. Accessed August 19, 2017. http://hdl.handle.net/10150/318152.

MLA Handbook (7^th Edition):

Johnson, Ralph Leroy, 1945-. “Block copolymers .” 1970. Web. 19 Aug 2017.

Vancouver:

Johnson, Ralph Leroy 1. Block copolymers . [Internet] [Masters thesis]. University of Arizona; 1970. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/10150/318152.

Council of Science Editors:

Johnson, Ralph Leroy 1. Block copolymers . [Masters Thesis]. University of Arizona; 1970. Available from: http://hdl.handle.net/10150/318152

University of Alberta

17. Zhang, Xiaojiang. Patterning of Nanostructures by Block Copolymer Self-Assembly.

Degree: PhD, Department of Chemistry, 2011, University of Alberta

URL: https://era.library.ualberta.ca/files/sq87bt851

► Fabrication of nanofeatures with precisely defined size and ordering is essential for a broad range of technologically important applications, including integrated circuit production. Self-organizing block… (more)

▼ Fabrication of nanofeatures with precisely defined size and ordering is essential for a broad range of technologically important applications, including integrated circuit production. Self-organizing block copolymers are capable of patterning substrates with nanoscale precision. This thesis describes patterning of nanostructures by block copolymer self-assembly. Rapid block copolymer self-assembly was realized with an innovative microwave-based method that used a scientific microwave reactor to anneal block copolymer films inside a sealed container in the presence of an appropriate solvent. Simple transformation of the as-annealed poly(styrene)-block-poly(2-vinylpyridine) (PS-b-P2VP) block copolymer films into metallic nanostructures led to better visualization of the self-assembled pattern in SEM. A study was made of a number of different parameters affecting the polymer assembly speed and the pattern defect density, such as solvent, annealing time, annealing temperature, and substrate resistivity. The approach was also applied to the commonly used poly(styrene)-block-poly(methyl methacrylate) block copolymers. Highly ordered linear patterns were obtained both on un-prepatterned substrates and e-beam lithography defined substrates in less than 3 minutes. On adapting the microwave annealing technique to a conventional household microwave oven, highly ordered linear structures of self-assembled BCPs were obtained in 60 seconds. Using binary PS-b-P2VP block copolymer blends, linear feature spacing was readily controlled with nanometer scale precision. To show the high level of control over feature spacing, 12 to 19 metallic nanolines were fabricated between 500-nm-wide topographic wall-like silica features on a silicon surfaces with an annealing time of less than 2 minutes. In addition, PS-b-P2VP/PS-b-P4VP binary blends were used to produce hybrid dot and line nanostructures. Although this study is still in an early stage, the concept of using self-assembled PS-b-P2VP/PS-b-P4VP mixture to template hybrid metallic nanostructures was successfully demonstrated. PS-b-P4VP block copolymer films were employed as templates to pattern silicon surfaces with pseudo-hexagonal arrays of nanoscale etched pits, using a simple etching in HF(aq). The etched pit interiors were terminated by Si-Hx while the top unetched silicon surface remains capped by the native silicon oxide. The potential utility of this interface was demonstrated by selective patterning of a nanostructured metal oxide and metal features within these pits on the silicon top face.

Subjects/Keywords: Integrated circuits – Materials; Nanotechnology; Block copolymers; Nanostructures

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APA (6^th Edition):

Zhang, X. (2011). Patterning of Nanostructures by Block Copolymer Self-Assembly. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/sq87bt851

Chicago Manual of Style (16^th Edition):

Zhang, Xiaojiang. “Patterning of Nanostructures by Block Copolymer Self-Assembly.” 2011. Doctoral Dissertation, University of Alberta. Accessed August 19, 2017. https://era.library.ualberta.ca/files/sq87bt851.

MLA Handbook (7^th Edition):

Zhang, Xiaojiang. “Patterning of Nanostructures by Block Copolymer Self-Assembly.” 2011. Web. 19 Aug 2017.

Vancouver:

Zhang X. Patterning of Nanostructures by Block Copolymer Self-Assembly. [Internet] [Doctoral dissertation]. University of Alberta; 2011. [cited 2017 Aug 19]. Available from: https://era.library.ualberta.ca/files/sq87bt851.

Council of Science Editors:

Zhang X. Patterning of Nanostructures by Block Copolymer Self-Assembly. [Doctoral Dissertation]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/sq87bt851

University of Sydney

18. Altarawneh, Ibrahem. CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION .

Degree: 2009, University of Sydney

URL: http://hdl.handle.net/2123/4984

► Free radical emulsion polymerization (FRP) is widely adopted in industry due to its applicability to a wide range of monomers. Despite its many benefits and… (more)

▼ Free radical emulsion polymerization (FRP) is widely adopted in industry due to its applicability to a wide range of monomers. Despite its many benefits and wide spread use, the fast chain growth and the presence of rapid irreversible termination impose limitations with respect to the degree of control in FRP. Furthermore, producing block copolymers and polymers with complex structures via FRP is not feasible. Closer control of macromolecular chain structure and molar mass, using novel polymerization techniques, is required to synthesize and optimize many new polymer products. Reversible addition fragmentation chain transfer (RAFT)-mediated polymerization is a novel controlled living free radical technique used to impart living characters in free radical polymerization. In combination with emulsion polymerization, the process is industrially promising and attractive for the production of tailored polymeric products. It allows for the production of particles with specially-tailored properties, including size, composition, morphology, and molecular weights. The mechanism of RAFT process and the effect of participating groups were discussed with reviews on the previous work on rate retardation. A mathematical model accounting for the effect of concentrations of propagating, intermediate, dormant and dead chains was developed based on their reaction pathways. The model was combined with a chain-length dependent termination model in order to account for the decreased termination rate. The model was validated against experimental data for solution and bulk polymerizations of styrene. The role of the intermediate radical and the effect of RAFT agent on the chain length dependent termination rate were addressed theoretically. The developed kinetic model was used with validated kinetic parameters to assess the observed retardation in solution polymerization of styrene with high active RAFT agent (cumyl dithiobenzoate). The fragmentation rate coefficient was used as a model parameter, and a value equal to 6×104 s-1 was found to provide a good agreement with the experimental data. The model predictions indicated that the observed retardation could be attributed to the cross termination of the intermediate radical and, to some extent, to the RAFT effect on increasing the average termination rate coefficient. The model predictions showed that to preserve the living nature of RAFT polymerization, a low initiator concentration is recommended. In line with the experimental data, model simulations revealed that the intermediate radical prefers fragmentation in the direction of the reactant. The application of RAFT process has also been extended to emulsion polymerization of styrene. A comprehensive dynamic model for batch and semi-batch emulsion polymerizations with a reversible addition-fragmentation chain transfer process was developed. To account for the integration of the RAFT process, new modifications were added to the kinetics of zero-one emulsion polymerization. The developed model was designed to predict key polymer…

Subjects/Keywords: Emulsion polymerization; Block copolymers; Xanthate; Molecular weight

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APA (6^th Edition):

Altarawneh, I. (2009). CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/4984

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):

Altarawneh, Ibrahem. “CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION .” 2009. Thesis, University of Sydney. Accessed August 19, 2017. http://hdl.handle.net/2123/4984.

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

MLA Handbook (7^th Edition):

Altarawneh, Ibrahem. “CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION .” 2009. Web. 19 Aug 2017.

Vancouver:

Altarawneh I. CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION . [Internet] [Thesis]. University of Sydney; 2009. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2123/4984.

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

Council of Science Editors:

Altarawneh I. CONTROL OF KEY POLYMER PROPERTIES VIA REVERSIBLE ADDITION-FRAGMENTATION CHAIN TRANSFER IN EMULSION POLYMERIZATION . [Thesis]. University of Sydney; 2009. Available from: http://hdl.handle.net/2123/4984

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

19. O'Leary, Kelly Ann. Physical properties of poly (n-alkyl acrylate) copolymers.

Degree: Chemical Engineering, 2005, University of Texas – Austin

URL: http://hdl.handle.net/2152/2327

Subjects/Keywords: Block copolymers

…copolymers do not co-crystallize and experience melting point depression in which the non… …crystallinity is reflected in the permeability data for the copolymers. Poly (n-alkyl acrylates… …melting. The depression in crystallinity for both types of copolymers results in a smaller… …permeation jump. Interestingly, copolymers containing A10, a comonomer on the border of being… …crystalline, experience the broadest jump peak. The jump breadth of all copolymers examined…

5 more images…

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APA (6^th Edition):

O'Leary, K. A. (2005). Physical properties of poly (n-alkyl acrylate) copolymers. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/2327

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):

O'Leary, Kelly Ann. “Physical properties of poly (n-alkyl acrylate) copolymers.” 2005. Thesis, University of Texas – Austin. Accessed August 19, 2017. http://hdl.handle.net/2152/2327.

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

MLA Handbook (7^th Edition):

O'Leary, Kelly Ann. “Physical properties of poly (n-alkyl acrylate) copolymers.” 2005. Web. 19 Aug 2017.

Vancouver:

O'Leary KA. Physical properties of poly (n-alkyl acrylate) copolymers. [Internet] [Thesis]. University of Texas – Austin; 2005. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2152/2327.

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

Council of Science Editors:

O'Leary KA. Physical properties of poly (n-alkyl acrylate) copolymers. [Thesis]. University of Texas – Austin; 2005. Available from: http://hdl.handle.net/2152/2327

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

20. Herman, Doreen S. A compositional study of the morphology of 18-armed poly(styrene-isoprene) star-block copolymers.

Degree: Polymer Science & Engineering, 1986, University of Massachusetts

URL: http://scholarworks.umass.edu/theses/1604

Subjects/Keywords: Block copolymers; Styrene

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APA (6^th Edition):

Herman, D. S. (1986). A compositional study of the morphology of 18-armed poly(styrene-isoprene) star-block copolymers. (Thesis). University of Massachusetts. Retrieved from http://scholarworks.umass.edu/theses/1604

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):

Herman, Doreen S. “A compositional study of the morphology of 18-armed poly(styrene-isoprene) star-block copolymers.” 1986. Thesis, University of Massachusetts. Accessed August 19, 2017. http://scholarworks.umass.edu/theses/1604.

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

MLA Handbook (7^th Edition):

Herman, Doreen S. “A compositional study of the morphology of 18-armed poly(styrene-isoprene) star-block copolymers.” 1986. Web. 19 Aug 2017.

Vancouver:

Herman DS. A compositional study of the morphology of 18-armed poly(styrene-isoprene) star-block copolymers. [Internet] [Thesis]. University of Massachusetts; 1986. [cited 2017 Aug 19]. Available from: http://scholarworks.umass.edu/theses/1604.

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

Council of Science Editors:

Herman DS. A compositional study of the morphology of 18-armed poly(styrene-isoprene) star-block copolymers. [Thesis]. University of Massachusetts; 1986. Available from: http://scholarworks.umass.edu/theses/1604

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

Virginia Tech

21. Flack, Matthew Alexander. Novel Approaches To The Synthesis of Clicked Block Copolymers.

Degree: Chemistry, 2010, Virginia Tech

URL: http://hdl.handle.net/10919/35801

► Block copolymers are widely used in both the academic and industrial communities due to their unique properties. With the development of living polymerization techniques, the… (more)

Subjects/Keywords: Click chemistry; Polystyrene; Polyisoprene; Block copolymers

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APA (6^th Edition):

Flack, M. A. (2010). Novel Approaches To The Synthesis of Clicked Block Copolymers. (Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/35801

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):

Flack, Matthew Alexander. “Novel Approaches To The Synthesis of Clicked Block Copolymers.” 2010. Thesis, Virginia Tech. Accessed August 19, 2017. http://hdl.handle.net/10919/35801.

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

MLA Handbook (7^th Edition):

Flack, Matthew Alexander. “Novel Approaches To The Synthesis of Clicked Block Copolymers.” 2010. Web. 19 Aug 2017.

Vancouver:

Flack MA. Novel Approaches To The Synthesis of Clicked Block Copolymers. [Internet] [Thesis]. Virginia Tech; 2010. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/10919/35801.

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

Council of Science Editors:

Flack MA. Novel Approaches To The Synthesis of Clicked Block Copolymers. [Thesis]. Virginia Tech; 2010. Available from: http://hdl.handle.net/10919/35801

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

University of Texas – Austin

22. Zhou, Sunshine. Engineering block copolymers for advanced lithography.

Degree: Chemical Engineering, 2017, University of Texas – Austin

URL: http://hdl.handle.net/2152/47128

► Block copolymer (BCP) nanoimprint lithography is an attractive possible solution for manufacturing hard disk drives with information densities greater than 1 Tbit/in². At these densities,… (more)

Subjects/Keywords: Block copolymers; Copolymer; BCP; Lithography; Nanoimprint

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APA (6^th Edition):

Zhou, S. (2017). Engineering block copolymers for advanced lithography. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/47128

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):

Zhou, Sunshine. “Engineering block copolymers for advanced lithography.” 2017. Thesis, University of Texas – Austin. Accessed August 19, 2017. http://hdl.handle.net/2152/47128.

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

MLA Handbook (7^th Edition):

Zhou, Sunshine. “Engineering block copolymers for advanced lithography.” 2017. Web. 19 Aug 2017.

Vancouver:

Zhou S. Engineering block copolymers for advanced lithography. [Internet] [Thesis]. University of Texas – Austin; 2017. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2152/47128.

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

Council of Science Editors:

Zhou S. Engineering block copolymers for advanced lithography. [Thesis]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/47128

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

University of Texas – Austin

23. Bates, Christopher Martin. Advanced materials for block copolymer lithography.

Degree: Chemistry, 2013, University of Texas – Austin

URL: http://hdl.handle.net/2152/25126

► The multi-billion dollar per year lithography industry relies on the fusion of chemistry, materials science, and engineering to produce technological innovations that enable continual improvements… (more)

▼ The multi-billion dollar per year lithography industry relies on the fusion of chemistry, materials science, and engineering to produce technological innovations that enable continual improvements in the speed and storage density of microelectronic devices. A critical prerequisite to improving the computers of today relies on the ability to economically and controllably form thin film structures with dimensions on the order of tens of nanometers. One class of materials that potentially meets these requirements is block copolymers since they can self-assemble into structures with characteristic dimensions circa three to hundreds of nanometers. The different aspects of the block copolymer lithographic process are the subject of this dissertation. A variety of interrelated material requirements virtually necessitate the synthesis of block copolymers specifically designed for lithographic applications. Key properties for the ideal block copolymer include etch resistance to facilitate thin film processing, a large interaction parameter to enable the formation of high resolution structures, and thin film orientation control. The unifying theme for the materials synthesized herein is the presence of silicon in one block, which imparts oxygen etch resistance to just that domain. A collection of silicon-containing block copolymers was synthesized and characterized, many of which readily form features on approximately the length scale required for next-generation microelectronic devices. The most important thin film processing step biases the orientation of block copolymer domains perpendicular to the substrate by control of interfacial interactions. Both solvent and thermal annealing techniques were extensively studied to achieve orientation control. Ultimately, a dual top and bottom surface functionalization strategy was developed that utilizes a new class of "top coats" and cross-linkable substrate surface treatments. Perpendicular block copolymer features can now be produced quickly with a process amenable to existing manufacturing technology, which was previously impossible. The development of etching recipes and pattern transfer processes confirmed the through-film nature of the features and the efficacy of both the block copolymer design and the top coat process. Advisors/Committee Members: Willson, C. Grant, 1939- (advisor).

Subjects/Keywords: Block copolymers; Lithography; Top coats; Surface treatments

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APA (6^th Edition):

Bates, C. M. (2013). Advanced materials for block copolymer lithography. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/25126

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):

Bates, Christopher Martin. “Advanced materials for block copolymer lithography.” 2013. Thesis, University of Texas – Austin. Accessed August 19, 2017. http://hdl.handle.net/2152/25126.

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

MLA Handbook (7^th Edition):

Bates, Christopher Martin. “Advanced materials for block copolymer lithography.” 2013. Web. 19 Aug 2017.

Vancouver:

Bates CM. Advanced materials for block copolymer lithography. [Internet] [Thesis]. University of Texas – Austin; 2013. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2152/25126.

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

Council of Science Editors:

Bates CM. Advanced materials for block copolymer lithography. [Thesis]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/25126

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

Penn State University

24. Weikel, Arlin Lee. NEW MATERIALS FOR ADVANCED BIOMATERIAL APPLICATIONS.

Degree: PhD, Chemistry, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/10907

► The work described in this thesis focuses on the design, synthesis, and characterization of novel polyphosphazenes for advanced biomedical applications. In addition, the fabrication of… (more)

▼ The work described in this thesis focuses on the design, synthesis, and characterization of novel polyphosphazenes for advanced biomedical applications. In addition, the fabrication of polyphosphazene / poly(lactic-co-glycolic acid) (PLGA) blends were examined for their physical properties as hard tissue engineering scaffolds. Chapter 1 outlines the basic fundamentals of polymer chemistry, along with phosphazene chemistry and its application to biomedical materials. Chapter 2 discusses the synthesis of the dipeptides alanyl-glycine ethyl ester, valinyl-glycine ethyl ester, and phenylalanyl-glycine ethyl esters. These dipeptides were synthesized using mixed anhydride solution-phase peptide reactions. The free N-terminus was used as a reactive site for nucleophilic replacement of the chlorine atoms in poly(dichlorophosphazene). The C-terminus was protected with an ethyl ester to prevent side reactions and crosslinking. The alanyl-glycine ethyl ester replaced all the chlorine atoms in poly(dichlorophosphazene). However, replacement of all the chlorine atoms in poly(dichlorophosphazene) by valinyl-glycine ethyl ester or phenylalanyl-glycine ethyl ester polyphosphazenes was prevented by the insolubility of the partially substituted intermediates. To circumvent this problem, co-substitution was carried out using the valinyl- or phenylalanyl esters with glycine ethyl ester or alanine ethyl ester in a 1:1 ratio. Co-substituted polyphosphazenes with alanyl glycine ethyl ester and glycine ethyl ester or alanine ethyl ester were also synthesized with a side group ratio of 1:1. The polymer structures and physical properties were studied using multinuclear NMR, DSC, and GPC techniques. Heterophase hydrolysis experiments in aqueous media at different pH values were carried out to estimate the hydrolytic sensitivity of these polymers. All the polymers were less sensitive to hydrolysis under neutral or basic (pH, 10.0) conditions than at pH 4.0, where rapid hydrolysis occurred. Chapter 3 outlines the preparation of phosphazene tissue engineering scaffolds with bioactive side groups using the biological buffer choline chloride. Mixed-substituent phosphazene cyclic trimers (as model systems) and polymers with choline chloride and glycine ethyl ester, alanine ethyl ester, valine ethyl ester, or phenyl alanine ethyl ester were synthesized. Two different synthetic protocols were examined. A sodium hydride mediated route resulted in polyphosphazenes with a low choline content, while a cesium carbonate mediated process produced polyphosphazenes with higher choline content. The phosphazene structures and physical properties were studied using multinuclear NMR, differential scanning calorimetry (DSC), and GPC techniques. The resultant polymers were then blended with PLGA (50:50) or PLGA (85:15) and characterized by DSC analysis and scanning electron microscopy (SEM). Polymer products obtained via the sodium hydride route produced miscible blends with both ratios of PLGA, while the cesium carbonate route yielded products with reduced blend…

Subjects/Keywords: polyphosphazenes; amino acids; polymer blends; block copolymers

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APA (6^th Edition):

Weikel, A. L. (2010). NEW MATERIALS FOR ADVANCED BIOMATERIAL APPLICATIONS. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10907

Chicago Manual of Style (16^th Edition):

Weikel, Arlin Lee. “NEW MATERIALS FOR ADVANCED BIOMATERIAL APPLICATIONS.” 2010. Doctoral Dissertation, Penn State University. Accessed August 19, 2017. https://etda.libraries.psu.edu/catalog/10907.

MLA Handbook (7^th Edition):

Weikel, Arlin Lee. “NEW MATERIALS FOR ADVANCED BIOMATERIAL APPLICATIONS.” 2010. Web. 19 Aug 2017.

Vancouver:

Weikel AL. NEW MATERIALS FOR ADVANCED BIOMATERIAL APPLICATIONS. [Internet] [Doctoral dissertation]. Penn State University; 2010. [cited 2017 Aug 19]. Available from: https://etda.libraries.psu.edu/catalog/10907.

Council of Science Editors:

Weikel AL. NEW MATERIALS FOR ADVANCED BIOMATERIAL APPLICATIONS. [Doctoral Dissertation]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/10907

University of Pennsylvania

25. Hickey, Robert J. Solution-Phase Assembly of Nanoparticles and Amphiphilic Polymers: Controlling the Morphology From Vesicles to Micelles.

Degree: 2013, University of Pennsylvania

URL: http://repository.upenn.edu/edissertations/640

► Advances in nanocomposite solution-phase assembly involve understanding fundamentally how nanoparticles influence the self-assembly structure of block copolymers. Researchers have shown that self-assembly of amphiphilic block… (more)

Subjects/Keywords: Block Copolymers; Nanoparticles; Self-Assembly; Chemistry

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APA (6^th Edition):

Hickey, R. J. (2013). Solution-Phase Assembly of Nanoparticles and Amphiphilic Polymers: Controlling the Morphology From Vesicles to Micelles. (Thesis). University of Pennsylvania. Retrieved from http://repository.upenn.edu/edissertations/640

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):

Hickey, Robert J. “Solution-Phase Assembly of Nanoparticles and Amphiphilic Polymers: Controlling the Morphology From Vesicles to Micelles.” 2013. Thesis, University of Pennsylvania. Accessed August 19, 2017. http://repository.upenn.edu/edissertations/640.

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

MLA Handbook (7^th Edition):

Hickey, Robert J. “Solution-Phase Assembly of Nanoparticles and Amphiphilic Polymers: Controlling the Morphology From Vesicles to Micelles.” 2013. Web. 19 Aug 2017.

Vancouver:

Hickey RJ. Solution-Phase Assembly of Nanoparticles and Amphiphilic Polymers: Controlling the Morphology From Vesicles to Micelles. [Internet] [Thesis]. University of Pennsylvania; 2013. [cited 2017 Aug 19]. Available from: http://repository.upenn.edu/edissertations/640.

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

Council of Science Editors:

Hickey RJ. Solution-Phase Assembly of Nanoparticles and Amphiphilic Polymers: Controlling the Morphology From Vesicles to Micelles. [Thesis]. University of Pennsylvania; 2013. Available from: http://repository.upenn.edu/edissertations/640

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

University of New South Wales

26. Postma, Almar. Approaches to the synthesis of block and graft copolymers with well defined segment lengths.

Degree: Chemical Engineering & Industrial Chemistry, 2005, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/32822

► The synthesis of amine end-functionalised polymers by controlled free radical techniques has been investigated with a focus on methods that provide primary amino end-functionalised polystyrene.… (more)

▼ The synthesis of amine end-functionalised polymers by controlled free radical techniques has been investigated with a focus on methods that provide primary amino end-functionalised polystyrene. The aim of these investigations was to provide precursors to block and graft polyolefins and polyesters by interchain coupling reactions. The approaches investigated involved developing strategies for the synthesis of phthalimido-functional polymers which can be quantitatively deprotected to yield the desired amino-functional polymers. Initially synthesis by atom transfer radical polymerisation (ATRP) was explored. A number of approaches based on ω-functionalisation (end-group substitution) and α-functionalisation (functional initiator) were examined. A novel ATRP initiator, N-bromomethylphthalimide, provided the most promising results but still had limited applicability because of its low solubility in polymerisation media. The problems encountered with the ATRP approaches prompted an exploration of techniques based on reversible addition fragmentation chain transfer (RAFT) approach. Novel phthalimidomethyl RAFT agents (trithiocabonates, xanthates) were synthesized. The activity and scope of the new RAFT agents was investigated in polymerisations of styrene, n-butyl acrylate, Nisopropylacrylamide, N-vinylpyrrolidone (trithiocarbonate) and vinyl acetate (xanthate). The syntheses of α-phthalimidomethylpolystyrene were successfully scaled up and hydrazinolysis afforded a range of α- aminomethylpolystyrenes of low polydispersity and controlled molecular weight. The syntheses of primary amino-functional polymers using the pthalimidofunctional RAFT agents necessitated the development of a convenient method for conversion of trithiocarbonate groups to inert chain ends. Thermolysis proved a most simple and efficient method of achieving this for both polystyrene and poly(n-butyl acrylate). Thermolysis also provided a means of further characterising the mechanism of the RAFT process. A simple and efficient method for amino end-group analysis was developed that involved in-situ derivatisation with trichloroacetyl isocyanate followed by 1H NMR analysis. The method was shown to be a suitable method for determining a wide range protic end-groups (NH2, OH, COOH) in synthetic polymers. Finally, metallocene polyolefin based coupling trials largely with controlled amino-functional polystyrene were conducted as an initial investigation into the production of high value added grafted polyolefins (and polyester). The grafting trials were carried out on a small scale with a view to directing future experiments.

Subjects/Keywords: block; graft; copolymers

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

APA (6^th Edition):

Postma, A. (2005). Approaches to the synthesis of block and graft copolymers with well defined segment lengths. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/32822

Chicago Manual of Style (16^th Edition):

Postma, Almar. “Approaches to the synthesis of block and graft copolymers with well defined segment lengths.” 2005. Doctoral Dissertation, University of New South Wales. Accessed August 19, 2017. http://handle.unsw.edu.au/1959.4/32822.

MLA Handbook (7^th Edition):

Postma, Almar. “Approaches to the synthesis of block and graft copolymers with well defined segment lengths.” 2005. Web. 19 Aug 2017.

Vancouver:

Postma A. Approaches to the synthesis of block and graft copolymers with well defined segment lengths. [Internet] [Doctoral dissertation]. University of New South Wales; 2005. [cited 2017 Aug 19]. Available from: http://handle.unsw.edu.au/1959.4/32822.

Council of Science Editors:

Postma A. Approaches to the synthesis of block and graft copolymers with well defined segment lengths. [Doctoral Dissertation]. University of New South Wales; 2005. Available from: http://handle.unsw.edu.au/1959.4/32822

University of Arizona

27. Leland, John Everard, 1944-. Part I: Block copolymers Part II: Polymers of 1,3-dithioles .

Degree: 1972, University of Arizona

URL: http://hdl.handle.net/10150/565253

Subjects/Keywords: Polymers.; Block copolymers.

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APA (6^th Edition):

Leland, John Everard, 1. (1972). Part I: Block copolymers Part II: Polymers of 1,3-dithioles . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/565253

Chicago Manual of Style (16^th Edition):

Leland, John Everard, 1944-. “Part I: Block copolymers Part II: Polymers of 1,3-dithioles .” 1972. Doctoral Dissertation, University of Arizona. Accessed August 19, 2017. http://hdl.handle.net/10150/565253.

MLA Handbook (7^th Edition):

Leland, John Everard, 1944-. “Part I: Block copolymers Part II: Polymers of 1,3-dithioles .” 1972. Web. 19 Aug 2017.

Vancouver:

Leland, John Everard 1. Part I: Block copolymers Part II: Polymers of 1,3-dithioles . [Internet] [Doctoral dissertation]. University of Arizona; 1972. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/10150/565253.

Council of Science Editors:

Leland, John Everard 1. Part I: Block copolymers Part II: Polymers of 1,3-dithioles . [Doctoral Dissertation]. University of Arizona; 1972. Available from: http://hdl.handle.net/10150/565253

University of Illinois – Urbana-Champaign

28. Kumar, Manish. Biomimetic membranes as new materials for applications in envrionmental engineering and biology.

Degree: PhD, 0231, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/16976

► Biological water channel proteins, called aquaporins, provide selective and rapid transport of water across cell membranes. They utilize an elegant mechanism distinct from and more… (more)

▼ Biological water channel proteins, called aquaporins, provide selective and rapid transport of water across cell membranes. They utilize an elegant mechanism distinct from and more efficient than that used in commercial solute separation polymeric membranes such as Reverse Osmosis (RO) membranes. In this work, the bacterial Aquaporin (AqpZ) was functionally incorporated into synthetic biomimetic polymer vesicles. Using stopped flow light scattering, the permeability of such systems was determined to be up to two orders of magnitude higher than current RO membranes, revealing the potential of this approach. A templating procedure was then used to make flat membrane films with a high density of AqpZ. The sizes of these films are small (~500 nm) and more research needs to be performed to scale up this process. However, this method led to creation of flat 2D or thin 3D crystals of AqpZ in a polymer matrix as confirmed by electron diffraction. This indicates that the packing efficiency of these polymer-based systems is extremely high. Additionally, such crystals have the potential to allow for structural reconstruction of the incorporated aquaporins. This procedure can thus provide fundamental knowledge regarding the conformation of membrane proteins in block copolymers and help in design of functional protein-polymer hybrid materials. This work also led to the serendipitous discovery of AqpZ gating (reversible closure) at low pH values when incorporated into triblock copolymer vesicles. This gating is also present in bacteria and has relevance for bacterial survival under acid and osmotic shock. An overall scheme of osmoregulation and acidic shock survival utilizing coordinated activation and gating of membrane proteins is proposed. Several research ideas resulted from this work and are currently being pursued. This includes determination of insertion efficiency of membrane proteins in block copolymers, the use of block copolymer membranes for studying gas transport in membrane proteins, block copolymer vesicles with encapsulated perchlorate degrading enzymes for water treatment, and carbon capture using active CO2 transporters inserted into block copolymer membranes. Overall, this work has demonstrated the promise of using hybrid protein-polymer systems for environmental engineering applications. In particular its applicability to synthetic desalination membranes is most promising and relevant. The basic approach used here may be applied to any separation for which a specific transport protein is available or could be engineered. My work has also contributed to understanding the properties of aquaporins, in particular AqpZ and its possible role in microbial physiology. Finally, recent successes in immobilizing protein molecules and in synthesizing 2D crystals of membrane proteins may provide an excellent way to answer fundamental questions regarding the structure and function of these membrane proteins in block copolymers. In broad terms, this work has shown that biology provides excellent… Advisors/Committee Members: Clark, Mark M. (advisor), Zilles, Julie L. (Committee Chair), Clark, Mark M. (committee member), Snoeyink, Vernon L. (committee member), Meier, Wolfgang P. (committee member).

Subjects/Keywords: Biomimetic Membranes; Aquaporins; Block copolymers; Desalination

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APA (6^th Edition):

Kumar, M. (2010). Biomimetic membranes as new materials for applications in envrionmental engineering and biology. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/16976

Chicago Manual of Style (16^th Edition):

Kumar, Manish. “Biomimetic membranes as new materials for applications in envrionmental engineering and biology.” 2010. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed August 19, 2017. http://hdl.handle.net/2142/16976.

MLA Handbook (7^th Edition):

Kumar, Manish. “Biomimetic membranes as new materials for applications in envrionmental engineering and biology.” 2010. Web. 19 Aug 2017.

Vancouver:

Kumar M. Biomimetic membranes as new materials for applications in envrionmental engineering and biology. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2010. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/2142/16976.

Council of Science Editors:

Kumar M. Biomimetic membranes as new materials for applications in envrionmental engineering and biology. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/16976

University of Minnesota

29. Chen, Liang. Fabricating robust nanoporous materials and polymer electrolyte membranes from reactive block copolymers by metathesis reactions.

Degree: PhD, Chemistry, 2009, University of Minnesota

URL: http://purl.umn.edu/54274

► Polymer membranes have been studied for several decades, and conventional utility of these membranes has been realized over a wide range of applications such as… (more)

▼ Polymer membranes have been studied for several decades, and conventional utility of these membranes has been realized over a wide range of applications such as water purification, gas separation, and fuel cells. Separation performance of polymer membranes for these applications can be evaluated from different aspects including selectivity, material cost, and thermal and mechanical stabilities. This research focused on the design of crosslinked polymer membranes from reactive block copolymers, which could possess some attractive features such as controlled functionality and morphology. Novel block copolymers containing a chemically crosslinkable block and a chemically modifiable block were of particular interest. Metathesis reactions were employed to crosslink these copolymers with additional tough polymers such as polycyclooctene (PCOE) and polydicyclopentadiene (polyDCPD), to realize enhanced toughness in the resulting materials. First, a norbornene-functionalized polystyrene-polylactide (PNS-PLA) block copolymer was synthesized. A self-assembled blend containing this copolymer and DCPD was cured by metathesis reactions, and nanoporous monoliths with a cylindrical morphology were successfully produced after removing the PLA component. These monoliths exhibited pronounced mechanical and thermal stabilities superior to nanoporous polystyrene (PS). Second, polymerization induced phase separation (PIPS) during the ring-opening metathesis polymerization (ROMP) of DCPD in the presence of the PNS-PLA copolymer rendered continuous PLA nanodomains in a crosslinked PNS/polyDCPD matrix. Upon etching the PLA component, the resultant nanoporous membranes exhibited well-defined percolated nanopores and good thermal and mechanical stabilities. Preliminary diffusion measurements demonstrated potential utility of such membranes in ultrafiltration. Third, crosslinked polymer electrolyte membranes (PEMs) were fabricated from a PNS-poly(n-propyl-p-styrenesulfonate) (PSSP) block polymer and COE/DCPD via the PIPS scheme followed by deprotection of the PSSP block. These PEMs possessed a bicontinuous morphology and mechanical and thermal robustness. Select PEMs exhibited high proton conductivity similar to Nafion at high humidity and reduced methanol crossover. Tunable domain size and mechanical strength of the resulting PEMs are advantageous attributes of this preparation protocol. Additionally, the use of such PEMs for NH3 separation from gas mixtures was demonstrated. The appendix chapter represented our efforts to produce amine-functionalized polymer membranes from PNS-poly(dimethylaminoethylmethacrylate) (PNS-PDMAEMA) and COE by metathesis reactions, potentially useful for CO2 separation from gas mixtures.

Subjects/Keywords: Polymer Electrolyte Membranes; Block Copolymers; Metathesis; Chemisrty

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APA (6^th Edition):

Chen, L. (2009). Fabricating robust nanoporous materials and polymer electrolyte membranes from reactive block copolymers by metathesis reactions. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/54274

Chicago Manual of Style (16^th Edition):

Chen, Liang. “Fabricating robust nanoporous materials and polymer electrolyte membranes from reactive block copolymers by metathesis reactions.” 2009. Doctoral Dissertation, University of Minnesota. Accessed August 19, 2017. http://purl.umn.edu/54274.

MLA Handbook (7^th Edition):

Chen, Liang. “Fabricating robust nanoporous materials and polymer electrolyte membranes from reactive block copolymers by metathesis reactions.” 2009. Web. 19 Aug 2017.

Vancouver:

Chen L. Fabricating robust nanoporous materials and polymer electrolyte membranes from reactive block copolymers by metathesis reactions. [Internet] [Doctoral dissertation]. University of Minnesota; 2009. [cited 2017 Aug 19]. Available from: http://purl.umn.edu/54274.

Council of Science Editors:

Chen L. Fabricating robust nanoporous materials and polymer electrolyte membranes from reactive block copolymers by metathesis reactions. [Doctoral Dissertation]. University of Minnesota; 2009. Available from: http://purl.umn.edu/54274

University of Victoria

30. Cheyne, Robert Bruce. Self-assembly of polystyrene-poly(ethylene oxide) block copolymers and polymer-stabilized cadmium sulfide nanoparticles at the air-water interface : patterning surface features from the bottom up.

Degree: Dept. of Chemistry, 2008, University of Victoria

URL: http://hdl.handle.net/1828/799

Subjects/Keywords: Block copolymers; Nanoparticles

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APA (6^th Edition):

Cheyne, R. B. (2008). Self-assembly of polystyrene-poly(ethylene oxide) block copolymers and polymer-stabilized cadmium sulfide nanoparticles at the air-water interface : patterning surface features from the bottom up. (Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/799

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):

Cheyne, Robert Bruce. “Self-assembly of polystyrene-poly(ethylene oxide) block copolymers and polymer-stabilized cadmium sulfide nanoparticles at the air-water interface : patterning surface features from the bottom up.” 2008. Thesis, University of Victoria. Accessed August 19, 2017. http://hdl.handle.net/1828/799.

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

MLA Handbook (7^th Edition):

Cheyne, Robert Bruce. “Self-assembly of polystyrene-poly(ethylene oxide) block copolymers and polymer-stabilized cadmium sulfide nanoparticles at the air-water interface : patterning surface features from the bottom up.” 2008. Web. 19 Aug 2017.

Vancouver:

Cheyne RB. Self-assembly of polystyrene-poly(ethylene oxide) block copolymers and polymer-stabilized cadmium sulfide nanoparticles at the air-water interface : patterning surface features from the bottom up. [Internet] [Thesis]. University of Victoria; 2008. [cited 2017 Aug 19]. Available from: http://hdl.handle.net/1828/799.

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

Council of Science Editors:

Cheyne RB. Self-assembly of polystyrene-poly(ethylene oxide) block copolymers and polymer-stabilized cadmium sulfide nanoparticles at the air-water interface : patterning surface features from the bottom up. [Thesis]. University of Victoria; 2008. Available from: http://hdl.handle.net/1828/799

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

Open Access Theses and Dissertations