subject:(Block copolymers)

Clemson University

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

Degree: MS, Chemistry, 2017, Clemson University

URL: https://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 https://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 January 19, 2021. https://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 Jan 2021.

Vancouver:

Wickramasinghe ANK. Structural Study of Multifunctional Block Co-polymers in Solutions and Thin Films. [Internet] [Masters thesis]. Clemson University; 2017. [cited 2021 Jan 19]. Available from: https://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: https://tigerprints.clemson.edu/all_theses/2687

Michigan State University

2. Harris, John Keith. Characterization and manipulation of vesicles formed from 1,2-butylene oxide/ethylene oxide diblock copolymers.

Degree: PhD, Department of Chemistry, 2003, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:33142

Subjects/Keywords: Block copolymers; Copolymers

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APA (6^th Edition):

Harris, J. K. (2003). Characterization and manipulation of vesicles formed from 1,2-butylene oxide/ethylene oxide diblock copolymers. (Doctoral Dissertation). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:33142

Chicago Manual of Style (16^th Edition):

Harris, John Keith. “Characterization and manipulation of vesicles formed from 1,2-butylene oxide/ethylene oxide diblock copolymers.” 2003. Doctoral Dissertation, Michigan State University. Accessed January 19, 2021. http://etd.lib.msu.edu/islandora/object/etd:33142.

MLA Handbook (7^th Edition):

Harris, John Keith. “Characterization and manipulation of vesicles formed from 1,2-butylene oxide/ethylene oxide diblock copolymers.” 2003. Web. 19 Jan 2021.

Vancouver:

Harris JK. Characterization and manipulation of vesicles formed from 1,2-butylene oxide/ethylene oxide diblock copolymers. [Internet] [Doctoral dissertation]. Michigan State University; 2003. [cited 2021 Jan 19]. Available from: http://etd.lib.msu.edu/islandora/object/etd:33142.

Council of Science Editors:

Harris JK. Characterization and manipulation of vesicles formed from 1,2-butylene oxide/ethylene oxide diblock copolymers. [Doctoral Dissertation]. Michigan State University; 2003. Available from: http://etd.lib.msu.edu/islandora/object/etd:33142

Tulane University

3. Lwoya, Baraka. Block copolymer synthesis and self-assembly for membrane and lithographic applications.

Degree: 2019, Tulane University

URL: https://digitallibrary.tulane.edu/islandora/object/tulane:92430

►

[email protected]

Silicon-based block copolymers have gained prominence because of their inherent ability to self-assemble at the low molecular weight. By utilizing this vital factor, we… (more)

Subjects/Keywords: Block copolymers; Thin films; Cyclic

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APA (6^th Edition):

Lwoya, B. (2019). Block copolymer synthesis and self-assembly for membrane and lithographic applications. (Thesis). Tulane University. Retrieved from https://digitallibrary.tulane.edu/islandora/object/tulane:92430

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):

Lwoya, Baraka. “Block copolymer synthesis and self-assembly for membrane and lithographic applications.” 2019. Thesis, Tulane University. Accessed January 19, 2021. https://digitallibrary.tulane.edu/islandora/object/tulane:92430.

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

MLA Handbook (7^th Edition):

Lwoya, Baraka. “Block copolymer synthesis and self-assembly for membrane and lithographic applications.” 2019. Web. 19 Jan 2021.

Vancouver:

Lwoya B. Block copolymer synthesis and self-assembly for membrane and lithographic applications. [Internet] [Thesis]. Tulane University; 2019. [cited 2021 Jan 19]. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:92430.

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

Council of Science Editors:

Lwoya B. Block copolymer synthesis and self-assembly for membrane and lithographic applications. [Thesis]. Tulane University; 2019. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:92430

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

Cornell University

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

Degree: 2009, Cornell University

URL: http://hdl.handle.net/1813/13762

► 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 January 19, 2021. 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 Jan 2021.

Vancouver:

Park J. Tri-Axial Electrospinning With Block Copolymers And Silica Precursor. [Internet] [Thesis]. Cornell University; 2009. [cited 2021 Jan 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

Penn State University

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

Degree: 2011, Penn State University

URL: https://submit-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… Advisors/Committee Members: Michael Anthony Hickner, Thesis Advisor/Co-Advisor, Michael Anthony Hickner, Thesis Advisor/Co-Advisor.

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 . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11786

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):

Moore, Hunter David. “MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS .” 2011. Thesis, Penn State University. Accessed January 19, 2021. https://submit-etda.libraries.psu.edu/catalog/11786.

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

MLA Handbook (7^th Edition):

Moore, Hunter David. “MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS .” 2011. Web. 19 Jan 2021.

Vancouver:

Moore HD. MORPHOLOGY AND TRANSPORT PROPERTIES OF ION-CONTAINING TRIBLOCK COPOLYMERS . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Jan 19]. Available from: https://submit-etda.libraries.psu.edu/catalog/11786.

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

Council of Science Editors:

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

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

McMaster University

6. 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 January 19, 2021. http://hdl.handle.net/11375/16802.

MLA Handbook (7^th Edition):

Rahman, Abidur. “Shear thinning silicone-PEG block copolymers.” 2015. Web. 19 Jan 2021.

Vancouver:

Rahman A. Shear thinning silicone-PEG block copolymers. [Internet] [Masters thesis]. McMaster University; 2015. [cited 2021 Jan 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

Columbia University

7. Tran, Helen. Block copolymer templates for functional nanostructured materials: Periodic patterning and hierarchical ordering.

Degree: 2017, Columbia University

URL: https://doi.org/10.7916/D8K64JDW

► Simple molecular building blocks, arranged in a repeating manner with hierarchical levels of organization, may lead to emergent functional properties, which would not otherwise be… (more)

Subjects/Keywords: Nanostructured materials; Chemistry; Block copolymers

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APA (6^th Edition):

Tran, H. (2017). Block copolymer templates for functional nanostructured materials: Periodic patterning and hierarchical ordering. (Doctoral Dissertation). Columbia University. Retrieved from https://doi.org/10.7916/D8K64JDW

Chicago Manual of Style (16^th Edition):

Tran, Helen. “Block copolymer templates for functional nanostructured materials: Periodic patterning and hierarchical ordering.” 2017. Doctoral Dissertation, Columbia University. Accessed January 19, 2021. https://doi.org/10.7916/D8K64JDW.

MLA Handbook (7^th Edition):

Tran, Helen. “Block copolymer templates for functional nanostructured materials: Periodic patterning and hierarchical ordering.” 2017. Web. 19 Jan 2021.

Vancouver:

Tran H. Block copolymer templates for functional nanostructured materials: Periodic patterning and hierarchical ordering. [Internet] [Doctoral dissertation]. Columbia University; 2017. [cited 2021 Jan 19]. Available from: https://doi.org/10.7916/D8K64JDW.

Council of Science Editors:

Tran H. Block copolymer templates for functional nanostructured materials: Periodic patterning and hierarchical ordering. [Doctoral Dissertation]. Columbia University; 2017. Available from: https://doi.org/10.7916/D8K64JDW

University of Adelaide

8. 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 January 19, 2021. 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 Jan 2021.

Vancouver:

Girolamo M. Physicochemical study of poly (isoprene:styrene) block copolymers. [Internet] [Thesis]. University of Adelaide; 1971. [cited 2021 Jan 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

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

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. (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.” 1966. Thesis, University of Adelaide. Accessed January 19, 2021. 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.” 1966. Web. 19 Jan 2021.

Vancouver:

Lawry PS. An investigation of the synthesis of monodisperse block copolymers of predictable molecular weight and composition. [Internet] [Thesis]. University of Adelaide; 1966. [cited 2021 Jan 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. [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

10. 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 January 19, 2021. 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 Jan 2021.

Vancouver:

Urwin JR. Block copolymers / by J.R. Urwin. [Internet] [Thesis]. University of Adelaide; 1972. [cited 2021 Jan 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

Princeton University

11. Mulhearn, William. Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives .

Degree: PhD, 2018, Princeton University

URL: http://arks.princeton.edu/ark:/88435/dsp01cc08hj314

► A major theme within materials science is the development of structure-property relationships: understanding how small-scale details of chemistry and morphology give rise to observable behaviors.… (more)

▼ A major theme within materials science is the development of structure-property relationships: understanding how small-scale details of chemistry and morphology give rise to observable behaviors. The ideal approach employs a model system in which some aspect of chemistry or morphology can be systematically varied across a wide range, to observe the corresponding changes in macroscopic properties. An excellent system for this type of study in hydrocarbon polymers is the family of hydrogenated, substituted polynorbornenes synthesized by ring-opening metathesis polymerization (ROMP). This series shares a common backbone structure of five-membered hydrocarbon rings linked by two-carbon bridges, and a substituent group can be appended to each ring to tune the thermodynamic and mechanical properties. This dissertation makes use of eight polynorbornene species, including variants bearing n-alkyl, branched alkyl, cycloalkyl, and aromatic substituents. In much of this work, linear polyethylene (PE) is employed as a model against which the properties of the polynorbornene derivatives are contrasted. PE is a hugely important synthetic polymer, and a major interest of this thesis is the identification of polynorbornene-based species that can be combined with PE to exhibit useful properties. This work is organized into several sections, each of which informs and motivates the next. First, ROMP of cyclopentene is examined as a crucial synthetic precursor to PE. The influence of “acyclic metathesis” side-reactions is quantified, methods for preparing well-defined, narrow-distribution polymer are developed, and a kinetic model is derived. Second, the mixing thermodynamics of polynorbornene-containing diblock copolymers are investigated. Commonly employed thermodynamic models are tested and sources of deviations are explored. Several polynorbornene derivatives are identified that exhibit both high glass transition temperatures (Tg) and substantial miscibility with PE, an extraordinarily rare combination of properties. Finally, the unusual phase behavior of one polymer pair, which de-mixes upon heating, is examined in detail. Third, one of the high-Tg polynorbornene derivatives is selected for incorporation into majority-PE diblock copolymers. With judicious choices of block lengths and thermal history, the low-strain mechanical properties of these “glassy-PE” diblock copolymers can be dramatically improved over those of the PE homopolymer. Advisors/Committee Members: Register, Richard (advisor).

Subjects/Keywords: Block Copolymers; Polymer Physics

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APA (6^th Edition):

Mulhearn, W. (2018). Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives . (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01cc08hj314

Chicago Manual of Style (16^th Edition):

Mulhearn, William. “Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives .” 2018. Doctoral Dissertation, Princeton University. Accessed January 19, 2021. http://arks.princeton.edu/ark:/88435/dsp01cc08hj314.

MLA Handbook (7^th Edition):

Mulhearn, William. “Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives .” 2018. Web. 19 Jan 2021.

Vancouver:

Mulhearn W. Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives . [Internet] [Doctoral dissertation]. Princeton University; 2018. [cited 2021 Jan 19]. Available from: http://arks.princeton.edu/ark:/88435/dsp01cc08hj314.

Council of Science Editors:

Mulhearn W. Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives . [Doctoral Dissertation]. Princeton University; 2018. Available from: http://arks.princeton.edu/ark:/88435/dsp01cc08hj314

University of Melbourne

12. Bicciocchi, Erika. Donor-acceptor block copolymers for photovoltaic applications.

Degree: 2013, University of Melbourne

URL: http://hdl.handle.net/11343/38435

► The performance of an organic photovoltaic (OPV) cell depends on the properties of the active layer, which usually consists of a blend of electron donor… (more)

▼ The performance of an organic photovoltaic (OPV) cell depends on the properties of the active layer, which usually consists of a blend of electron donor and acceptor materials. The donor (D) is often a π-conjugated polymer that also acts as the light absorbing medium, while the acceptor (A) is commonly a soluble fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). Since both donor and acceptor materials tend to phase separate on a macroscopic scale, the control of the morphology of this active layer is of utmost importance. The aim of this research is to explore the potential of rod-coil block to acts as blend compatibilizers for modifying OPV material morphology. A novel and widely applicable synthetic approach for donor-acceptor (D-A) rod-coil block copolymers has been developed that combines polycondensation techniques, such as Suzuki and Stille coupling, with radical addition fragmentation chain transfer (RAFT) polymerization. Suzuki and Stille couplings are the synthetic methods of choice for obtaining conjugated polymers with suitable electro-optical properties, while RAFT polymerization allows the synthesis of well-defined functional coil polymers with suitable end-groups able to end-cap the conjugated polymers. Two different series of rod-coil block copolymers have been prepared. The first series is based on a combination of Suzuki and RAFT, while the second series employs Stille and RAFT polymerization. The two rod-coil block copolymers obtained by Suzuki and RAFT polymerization techniques were based on the well-known conjugated polymer poly(9,9-dihexylfluorene-alt-bithiophene) (F6T2). In this series different ways to functionalize the coil block with the acceptor moieties were investigated and two new synthetic protocols were developed. The first one describes the successful synthesis of D A rod coil block copolymers through the cycloaddition of tosylhydrazone-functionalized polystyrene with fullerene (C60). The second methodology utilizes an acid chloride of the widely used electron acceptor [6’6]-phenyl-C61-butyric acid methyl ester (PCBM) in conjunction with an amine-containing coil block. In particular the latter protocol appears very suitable as it ensures the functionalization of the coil block without cross-linking. In order to develop a generic methodology for rod-coil block copolymers obtained by Stille and RAFT polymerizations, a new alternating D-A conjugated polymer was designed and synthesized. The building blocks for the Stille coupling were based on the well-known N-octylthieno[3,4-c]pyrrole-4,6-dione as well as a newly designed 2,3-bis(2-ethylhexyl)thiophenylethynyl substituted benzodithiophene. The introduction of electron rich thiophene units raised the HOMO level of the conjugated polymer and thus reduced the band gap for enhanced light absorption. This modification also introduces sterically less-demanding triple bonds, potentially…

Subjects/Keywords: block copolymers; compatibilizer; OPV

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APA (6^th Edition):

Bicciocchi, E. (2013). Donor-acceptor block copolymers for photovoltaic applications. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/38435

Chicago Manual of Style (16^th Edition):

Bicciocchi, Erika. “Donor-acceptor block copolymers for photovoltaic applications.” 2013. Doctoral Dissertation, University of Melbourne. Accessed January 19, 2021. http://hdl.handle.net/11343/38435.

MLA Handbook (7^th Edition):

Bicciocchi, Erika. “Donor-acceptor block copolymers for photovoltaic applications.” 2013. Web. 19 Jan 2021.

Vancouver:

Bicciocchi E. Donor-acceptor block copolymers for photovoltaic applications. [Internet] [Doctoral dissertation]. University of Melbourne; 2013. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11343/38435.

Council of Science Editors:

Bicciocchi E. Donor-acceptor block copolymers for photovoltaic applications. [Doctoral Dissertation]. University of Melbourne; 2013. Available from: http://hdl.handle.net/11343/38435

University of New South Wales

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

Degree: Chemistry, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/57315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43279/SOURCE02?view=true

► 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 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43279/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Mason, Alex. “Polymersomes as synthetic cell scaffolds.” 2017. Doctoral Dissertation, University of New South Wales. Accessed January 19, 2021. http://handle.unsw.edu.au/1959.4/57315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43279/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Mason, Alex. “Polymersomes as synthetic cell scaffolds.” 2017. Web. 19 Jan 2021.

Vancouver:

Mason A. Polymersomes as synthetic cell scaffolds. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2021 Jan 19]. Available from: http://handle.unsw.edu.au/1959.4/57315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43279/SOURCE02?view=true.

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 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:43279/SOURCE02?view=true

University of Texas – Austin

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

Degree: PhD, Chemical engineering, 2016, 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. G. (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. (2016). Design of silicon-containing block copolymer materials for applications in lithography. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/46239

Chicago Manual of Style (16^th Edition):

Blachut, Gregory. “Design of silicon-containing block copolymer materials for applications in lithography.” 2016. Doctoral Dissertation, University of Texas – Austin. Accessed January 19, 2021. http://hdl.handle.net/2152/46239.

MLA Handbook (7^th Edition):

Blachut, Gregory. “Design of silicon-containing block copolymer materials for applications in lithography.” 2016. Web. 19 Jan 2021.

Vancouver:

Blachut G. Design of silicon-containing block copolymer materials for applications in lithography. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2152/46239.

Council of Science Editors:

Blachut G. Design of silicon-containing block copolymer materials for applications in lithography. [Doctoral Dissertation]. University of Texas – Austin; 2016. Available from: http://hdl.handle.net/2152/46239

University of Texas – Austin

15. Sethuraman, Vaidyanathan Mathamangalath. Inverse coarse–graining methodologies to understand ion transport in block copolymer electrolytes.

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

URL: http://hdl.handle.net/2152/68196

► This research is focused on two fronts (i) developing multiscale simulation strategies for multicomponent polymers which can generate self assembled morphologies at both mesoscopic and… (more)

▼ This research is focused on two fronts (i) developing multiscale simulation strategies for multicomponent polymers which can generate self assembled morphologies at both mesoscopic and atomistic length scales (ii) understanding the conformational attributes and dynamics of polymers in structured morphologies to understand the ion–transport mechanisms in block copolymer electrolytes. First part of the work is devoted in developing strategies to create equilibrated block copolymer morphologies below ODT with hard repulsive potentials. To this end, ordered morphologies with the help soft repulsive potentials are generated which possess equilibrated long range order within very short computational time. A rigorous mapping between the interaction parameters of the hard and soft potentials is then utilized to obtain the intermolecular interaction parameter of the soft potential corresponding to the target hard potential repulsion parameter. Subsequent to establishing the long range structure, short repulsive potential (within a coarse-grained framework) is reintroduced and equilibrated to generate ordered morphologies using hard repulsive potentials. Further to this, both topological and dynamic properties in ordered lamellar phases were characterized. The topological constraints are seen to increase with increasing degree of segregation. On characterizing the local dynamics of polymeric segments, we found that inhomogeneities exist in the spatially local dynamics and the length scale of perturbation of such inhomogeneities is controlled by the interfacial width of the block copolymer. The last part of the work involved the generation of ion–doped block copolymer melts at the atomistic level and to compare the results obtained therein with those for pure homopolymeric melts. To this end, we employed a multiscale simulation method to generate PS–PEO block copolymer doped with LiPF₆ ions. Our results demonstrate that the cation-anion radial distribution functions (RDF) display stronger coordination in the block copolymer melts compared to pure PEO homopolymer melts. Radial distribution functions isolated in the PEO and PS domains demonstrate that the stronger coordination seen in BCPs arise from the influence of both the higher fraction of ions segregated in the PS phase and the influence of interactions in the PS domain. Further, the cation-anion RDFs display spatial heterogeneity, with a stronger cation-anion binding in the interfacial region compared to bulk of the PEO domain. Investigations into the ion transport mechanisms in PS-PEO block copolymer melt reveal that ions exhibit slower dynamics in both the block copolymer (overall) and in the PEO phase of the BCP melt. Such results are shown to arise from the effects of slower polymer segmental dynamics in the BCP melt and the coordination characteristics of the ions. Polymer backbone-ion residence times analyzed as a function of distance from the interface indicate that ions have a larger residence time near the interface compared to that near the bulk… Advisors/Committee Members: Ganesan, Venkat (advisor), Sanchez, Isaac C (committee member), Truskett, Thomas M (committee member), Ellison, Christopher J (committee member), Ren, Pengyu (committee member).

Subjects/Keywords: Block copolymers; Atomistic simulations

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APA (6^th Edition):

Sethuraman, V. M. (2017). Inverse coarse–graining methodologies to understand ion transport in block copolymer electrolytes. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/68196

Chicago Manual of Style (16^th Edition):

Sethuraman, Vaidyanathan Mathamangalath. “Inverse coarse–graining methodologies to understand ion transport in block copolymer electrolytes.” 2017. Doctoral Dissertation, University of Texas – Austin. Accessed January 19, 2021. http://hdl.handle.net/2152/68196.

MLA Handbook (7^th Edition):

Sethuraman, Vaidyanathan Mathamangalath. “Inverse coarse–graining methodologies to understand ion transport in block copolymer electrolytes.” 2017. Web. 19 Jan 2021.

Vancouver:

Sethuraman VM. Inverse coarse–graining methodologies to understand ion transport in block copolymer electrolytes. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2152/68196.

Council of Science Editors:

Sethuraman VM. Inverse coarse–graining methodologies to understand ion transport in block copolymer electrolytes. [Doctoral Dissertation]. University of Texas – Austin; 2017. Available from: http://hdl.handle.net/2152/68196

University of Utah

16. 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 January 19, 2021. 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 Jan 2021.

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 2021 Jan 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 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 January 19, 2021. 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 Jan 2021.

Vancouver:

Zhang X. Patterning of Nanostructures by Block Copolymer Self-Assembly. [Internet] [Doctoral dissertation]. University of Alberta; 2011. [cited 2021 Jan 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

Cornell University

18. 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 January 19, 2021. 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 Jan 2021.

Vancouver:

Kamperman MMG. Nanostructured and Porous High Temperature Ceramics Using Block Copolymer Mesophases. [Internet] [Thesis]. Cornell University; 2008. [cited 2021 Jan 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

Cornell University

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

Degree: PhD, Chemistry and Chemical Biology, 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. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/39425

Chicago Manual of Style (16^th Edition):

Robbins, Spencer. “Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides.” 2015. Doctoral Dissertation, Cornell University. Accessed January 19, 2021. http://hdl.handle.net/1813/39425.

MLA Handbook (7^th Edition):

Robbins, Spencer. “Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides.” 2015. Web. 19 Jan 2021.

Vancouver:

Robbins S. Synthesis And Characterization Of Ordered Mesoporous Transition Metal Oxides And Nitrides. [Internet] [Doctoral dissertation]. Cornell University; 2015. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1813/39425.

Council of Science Editors:

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

University of Victoria

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

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 January 19, 2021. 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 Jan 2021.

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 2021 Jan 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

Michigan State University

21. Zhao, Hui. Synthesis polyethersulfone-based amphiphilic block copolymers & development of single-ion conductors for lithium ion batteries.

Degree: 2012, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:1859

►

Thesis Ph. D. Michigan State University. Chemistry 2012.

ABSTRACTSYNTHESIS OF POLYETHERSULFONE-BASED AMPHIPHILIC BLOCK COPOLYMERS & DEVELOPMENT OF SINGLE ION CONDUCTORS FOR LITHIUM ION BATTERIESByHui Zhao… (more)

▼

Thesis Ph. D. Michigan State University. Chemistry 2012.

ABSTRACTSYNTHESIS OF POLYETHERSULFONE-BASED AMPHIPHILIC BLOCK COPOLYMERS & DEVELOPMENT OF SINGLE ION CONDUCTORS FOR LITHIUM ION BATTERIESByHui Zhao Polyethersulfone (PES) membranes often foul easily because of their hydrophobicity, and addition of amphiphilic PES block copolymers to membrane formulations may help overcome this problem. This dissertation explores the synthesis and aggregation properties of relevant amphiphilic ABA block copolymers, where PES is the hydrophobic B block and poly(2-hydroxyethyl methacrylate) or poly(2-hydroxypropyl methacrylate) are the hydrophilic A blocks. 1H nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) confirm the block copolymer synthesis, and 1H NMR spectra and TGA also provide consistent data on copolymer compositions. The amphiphilic copolymers aggregate when the amount of water in DMSO reaches 20 vol%, and dynamic light scattering (DLS) shows that aggregates have radii of ~60 nm at copolymer concentrations from 1 to 30 mg/mL.Lithium ion batteries are now ubiquitous, but concentration polarization is still a problem in the currently used battery electrolytes, especially in high-current applications. Immobilizing anions and having lithium cations contribute to most of the ionic conductivity is a good solution to address this problem of concentration polarization. This work aims to create nanoparticle-containing electrolytes using silica nanoparticles modified with polyanions that have Li+ as the counterion. Anion mobility is restricted by the polyanion polymer backbones, which is further immobilized by the nanoparticles. The polyelectrolyte-grafted nanoparticles were synthesized by surface atom transfer radical polymerization (ATRP) of monomers from initiator-grafted silica nanoparticles. To prepare a lithium-ion conductor, the polyelectrolyte-grafted nanoparticles were blended with poly(ethyleneglycol) dimethyl ether with Mw of ~500 (PEGDME-500). Because the anions are immobile, lithium is the only ion that conducts current. Four polyelectrolytes are used to form multilayer-grafted nanoparticles, aiming at improving conductivity of the material. FTIR and TGA are used to prove successful synthesis of the polymer modified particles. AC impedance shows that the best conductivity is from a Bis(trifluoromethanesulfonyl)imide (TFSI) analogue monomer, which is around 10-6 S/cm, which is in the same range as a monolayer-grafted silica nanoparticle system using similar TFSI analogue structure. A proposed model shows that the multilayer-grafted nanoparticles only have outermost layer of lithium cations accessible to the solution, because of the low solubility of polyelectrolytes in the PEGDME-500 solvent.Direct modifification of poly(ethyleneglycol) via alkyne-azide or thiol-ene click chemistry as single lithium ion conductor. To make sure 1,2,3-triazole or sulfur structure from click chemistry is not impeding lithium transport, we synthesize…

Advisors/Committee Members: Bruening, Merlin, Smith, Milton, Borhan, Babak, Wulff, William.

Subjects/Keywords: Lithium ion batteries; Block copolymers; Amphiphiles; Chemistry

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APA (6^th Edition):

Zhao, H. (2012). Synthesis polyethersulfone-based amphiphilic block copolymers & development of single-ion conductors for lithium ion batteries. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:1859

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):

Zhao, Hui. “Synthesis polyethersulfone-based amphiphilic block copolymers & development of single-ion conductors for lithium ion batteries.” 2012. Thesis, Michigan State University. Accessed January 19, 2021. http://etd.lib.msu.edu/islandora/object/etd:1859.

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

MLA Handbook (7^th Edition):

Zhao, Hui. “Synthesis polyethersulfone-based amphiphilic block copolymers & development of single-ion conductors for lithium ion batteries.” 2012. Web. 19 Jan 2021.

Vancouver:

Zhao H. Synthesis polyethersulfone-based amphiphilic block copolymers & development of single-ion conductors for lithium ion batteries. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Jan 19]. Available from: http://etd.lib.msu.edu/islandora/object/etd:1859.

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

Council of Science Editors:

Zhao H. Synthesis polyethersulfone-based amphiphilic block copolymers & development of single-ion conductors for lithium ion batteries. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:1859

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

University of Minnesota

22. Gallagher, James. Renewable polymer materials from bicyclic sugar derivatives.

Degree: PhD, Chemistry, 2016, University of Minnesota

URL: http://hdl.handle.net/11299/191358

► Sugar derivatives are excellent candidates for the building blocks of biobased plastics. This thesis focuses on the preparation of new monomers derived from bicyclic sugar… (more)

Subjects/Keywords: block copolymers; Glucarodilactone; Isosorbide; RAFT; renewable

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APA (6^th Edition):

Gallagher, J. (2016). Renewable polymer materials from bicyclic sugar derivatives. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/191358

Chicago Manual of Style (16^th Edition):

Gallagher, James. “Renewable polymer materials from bicyclic sugar derivatives.” 2016. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021. http://hdl.handle.net/11299/191358.

MLA Handbook (7^th Edition):

Gallagher, James. “Renewable polymer materials from bicyclic sugar derivatives.” 2016. Web. 19 Jan 2021.

Vancouver:

Gallagher J. Renewable polymer materials from bicyclic sugar derivatives. [Internet] [Doctoral dissertation]. University of Minnesota; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11299/191358.

Council of Science Editors:

Gallagher J. Renewable polymer materials from bicyclic sugar derivatives. [Doctoral Dissertation]. University of Minnesota; 2016. Available from: http://hdl.handle.net/11299/191358

University of Minnesota

23. Mannion, Alexander. Rheological Design of Sustainable Block Copolymers.

Degree: PhD, Chemical Engineering, 2016, University of Minnesota

URL: http://hdl.handle.net/11299/191496

► Block copolymers are extremely versatile materials that microphase separate to give rise to a rich array of complex behavior, making them the ideal platform for… (more)

Subjects/Keywords: block copolymers; polylactide; rheology; sustainable polymers

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APA (6^th Edition):

Mannion, A. (2016). Rheological Design of Sustainable Block Copolymers. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/191496

Chicago Manual of Style (16^th Edition):

Mannion, Alexander. “Rheological Design of Sustainable Block Copolymers.” 2016. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021. http://hdl.handle.net/11299/191496.

MLA Handbook (7^th Edition):

Mannion, Alexander. “Rheological Design of Sustainable Block Copolymers.” 2016. Web. 19 Jan 2021.

Vancouver:

Mannion A. Rheological Design of Sustainable Block Copolymers. [Internet] [Doctoral dissertation]. University of Minnesota; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11299/191496.

Council of Science Editors:

Mannion A. Rheological Design of Sustainable Block Copolymers. [Doctoral Dissertation]. University of Minnesota; 2016. Available from: http://hdl.handle.net/11299/191496

University of Minnesota

24. Wenger, Whitney. Quantum Dot Dispersion in Block Copolymer Matrices.

Degree: PhD, Chemical Engineering, 2018, University of Minnesota

URL: http://hdl.handle.net/11299/201052

► Quantum dots (QDs) have demonstrated viability for a wide set of applications ranging from bioimaging to electronics. Their unique size-tunable band gaps and accessibility for… (more)

▼ Quantum dots (QDs) have demonstrated viability for a wide set of applications ranging from bioimaging to electronics. Their unique size-tunable band gaps and accessibility for roll-to-roll processing via solution synthesis makes them promising candidates in many of these areas. Several of these applications benefit from carefully manipulated spacing in QD films, often achieved through integration of QDs in a polymer matrix. Although many studies have achieved varying degrees of success in dispersing QDs in polymer matrices, there remains much to be understood about the path dependency of QD integration and how QDs may be integrated into sphere-forming polymer matrices. In this work, CdSe QDs were synthesized via a hot injection technique in an air-free environment. These QDs were fabricated in a range of sizes based on the reaction time and were evaluated for their crystal structure, absorbance, fluorescence, ligand coverage, and dispersion in various solvents. The resulting QDs feature a wurtzite crystal structure and exhibit narrow absorbance and emission peaks. The QDs are well stabilized in nonpolar solvents like hexane and toluene via trioctylphosphine oxide (TOPO) and trioctylphosphine (TOP) ligands. In the first approach towards QD integration in polymer matrices, the native TOPO ligands were exchanged for a poly(ethylene glycol) ligand functionalized with a thiol end group. The resulting QDs were qualitatively and quantitatively analyzed to determine the ligand density on the QD surface and the QD dispersion in different solvents. After ligand exchange, the QDs were no longer dispersible in nonpolar solvents like hexane but formed stable dispersions in solvents like tetrahydrofuran, chloroform, and water. Upon ligand exchange, 50-85% of the original ligands were removed and an average of 2-4 poly(ethylene glycol) ligands were installed on each QD surface. The extent of QD dispersion in various homopolymers was evaluated using transmission electron microscopy (TEM). CdSe QDs were mixed with poly(lactic acid) in chloroform and dropcast into thin films for TEM. The resulting films indicate phase separation of the polymer and the QDs where the spacing between QDs does not change upon addition of the polymer. In a separate study, CdSe QDs were mixed with poly(butadiene) in n-hexane and dropcast into thin films for TEM. These films demonstrated an increase in spacing between the QDs of roughly 2 nm. However, the majority of the polymer does not end up in the space between QDs and is phase separated from the QD crystal phase. Finally, CdSe QDs after ligand exchange with PEG were mixed with poly(lactic acid) in chloroform and dropcast into thin films for TEM. The resulting films indicate some mixing between the QDs and the polymer. Finally, the extent of QD dispersion in various diblock copolymers was evaluated using small angle x-ray scattering (SAXS), TEM, and fluorescence measurements. CdSe QDs were mixed with a lamellae-forming poly(ethylene-b-cyclohexylethylene) in benzene and dried and heated to T ≈ 200°C…

Subjects/Keywords: Block Copolymers; Composites; Nanoparticles; Quantum dots

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APA (6^th Edition):

Wenger, W. (2018). Quantum Dot Dispersion in Block Copolymer Matrices. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/201052

Chicago Manual of Style (16^th Edition):

Wenger, Whitney. “Quantum Dot Dispersion in Block Copolymer Matrices.” 2018. Doctoral Dissertation, University of Minnesota. Accessed January 19, 2021. http://hdl.handle.net/11299/201052.

MLA Handbook (7^th Edition):

Wenger, Whitney. “Quantum Dot Dispersion in Block Copolymer Matrices.” 2018. Web. 19 Jan 2021.

Vancouver:

Wenger W. Quantum Dot Dispersion in Block Copolymer Matrices. [Internet] [Doctoral dissertation]. University of Minnesota; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11299/201052.

Council of Science Editors:

Wenger W. Quantum Dot Dispersion in Block Copolymer Matrices. [Doctoral Dissertation]. University of Minnesota; 2018. Available from: http://hdl.handle.net/11299/201052

25. Mitchell, Valerie. The design and evaluation of amphiphilic block copolymers for organic photovoltaic active layers with enhanced self-assembly and solubility in green solvents.

Degree: 2017, University of Melbourne

URL: http://hdl.handle.net/11343/192516

► Organic photovoltaic (OPV) devices employ solution-processable organic molecules as the photovoltaic active layer. This technology could allow the inexpensive production of flexible solar cells via… (more)

▼ Organic photovoltaic (OPV) devices employ solution-processable organic molecules as the photovoltaic active layer. This technology could allow the inexpensive production of flexible solar cells via a roll-to-roll printing process. However, current high-performance materials rely on chlorinated or aromatic solvent for dissolution which are unacceptable in industry. Additionally, photocurrent generation in OPV relies on a precise thin-film structure composed of an intercalating network of an electron-rich ‘donor’ material and electron-deficient ‘acceptor’ material. This is because in OPV absorption of light generates a coulombically bound exciton, which is split into free charges at the interface between materials with differing electron affinities. The ideal thin-film morphology of small but well-defined donor and acceptor domains is difficult to reproducibly achieve and maintain over the lifetime of the OPV device. These factors limit the commercial applicability of OPV. Linear block copolymers (BCPs), in which two or more polymeric species are covalently linked, are well-known for their ability to adopt precisely defined morphologies. The covalent linkage of donor and acceptor materials into a block BCP should allow the exploitation of this self-assembly in OPV. The donor-acceptor BCP system provides a route to a theoretically ideal morphology. but has thus far failed to produce high-performance solar cells. It is often difficult to achieve clean phase separation in block copolymers composed of the fully-conjugated polymers which are ideal for OPV application, which can increase charge recombination and decrease photocurrent. Furthermore, the syntheses used to produce fully-conjugated BCPs often generate complex mixtures of donor and acceptor homopolymers in addition to the BCP. Homopolymer contaminants can have a large effect on thin-film morphology and subsequent performance. Additionally, previously reported donor-acceptor BCPs require chlorinated and aromatic solvents for processing and are thus subject to the same industrial limitations faced by traditional OPV blends. In this work, an amphiphilic BCP design is investigated as a means of addressing the problems facing the industrial adoption of OPV technology. Amphiphilic donor- acceptor BCPs incorporate hydrophilic side-chains into one block of the copolymer, introducing dissimilarity between blocks and enhancing phase separation between the materials and increasing solubility in polar solvents. A series of four novel amphiphilic BCPs were synthesized and investigated as active layer materials for organic photovoltaic devices. Poly(3-hexylthiophene) (P3HT) acted as the donor material, while the acceptor blocks employed either a poly(fluorene-alt-benzothiadiazole) (PFTBT) or poly(naphthalene diimide-alt-bithiophene) (PNDIT2) scaffold. Oligo(ethylene glycol side-chains) were incorporated in the acceptor block to confer hydrophilicity. This design allowed the development of a purification technique capable of separating homopolymer from BCP, an advantage…

Subjects/Keywords: Block copolymers; organic photovoltaic; morphology; organic semiconductors

13 more images…

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APA (6^th Edition):

Mitchell, V. (2017). The design and evaluation of amphiphilic block copolymers for organic photovoltaic active layers with enhanced self-assembly and solubility in green solvents. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/192516

Chicago Manual of Style (16^th Edition):

Mitchell, Valerie. “The design and evaluation of amphiphilic block copolymers for organic photovoltaic active layers with enhanced self-assembly and solubility in green solvents.” 2017. Doctoral Dissertation, University of Melbourne. Accessed January 19, 2021. http://hdl.handle.net/11343/192516.

MLA Handbook (7^th Edition):

Mitchell, Valerie. “The design and evaluation of amphiphilic block copolymers for organic photovoltaic active layers with enhanced self-assembly and solubility in green solvents.” 2017. Web. 19 Jan 2021.

Vancouver:

Mitchell V. The design and evaluation of amphiphilic block copolymers for organic photovoltaic active layers with enhanced self-assembly and solubility in green solvents. [Internet] [Doctoral dissertation]. University of Melbourne; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11343/192516.

Council of Science Editors:

Mitchell V. The design and evaluation of amphiphilic block copolymers for organic photovoltaic active layers with enhanced self-assembly and solubility in green solvents. [Doctoral Dissertation]. University of Melbourne; 2017. Available from: http://hdl.handle.net/11343/192516

University of Arizona

26. 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 January 19, 2021. http://hdl.handle.net/10150/318152.

MLA Handbook (7^th Edition):

Johnson, Ralph Leroy, 1945-. “Block copolymers .” 1970. Web. 19 Jan 2021.

Vancouver:

Johnson, Ralph Leroy 1. Block copolymers . [Internet] [Masters thesis]. University of Arizona; 1970. [cited 2021 Jan 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 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 January 19, 2021. 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 Jan 2021.

Vancouver:

Leland, John Everard 1. Part I: Block copolymers Part II: Polymers of 1,3-dithioles . [Internet] [Doctoral dissertation]. University of Arizona; 1972. [cited 2021 Jan 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 New South Wales

28. 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 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1717/SOURCE02?view=true

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

▼ The synthesis of amine end-functionalised polymers by controlled free radicaltechniques has been investigated with a focus on methods that provide primaryamino end-functionalised polystyrene. The aim of these investigations was toprovide precursors to block and graft polyolefins and polyesters by interchaincoupling reactions.The approaches investigated involved developing strategies for the synthesis ofphthalimido-functional polymers which can be quantitatively deprotected to yieldthe 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 ATRPinitiator, N-bromomethylphthalimide, provided the most promising results butstill had limited applicability because of its low solubility in polymerisation media.The problems encountered with the ATRP approaches prompted an explorationof 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 wasinvestigated in polymerisations of styrene, n-butyl acrylate, Nisopropylacrylamide,N-vinylpyrrolidone (trithiocarbonate) and vinyl acetate(xanthate). The syntheses of α-phthalimidomethylpolystyrene weresuccessfully 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 pthalimidofunctionalRAFT agents necessitated the development of a convenient methodfor conversion of trithiocarbonate groups to inert chain ends. Thermolysisproved a most simple and efficient method of achieving this for both polystyreneand poly(n-butyl acrylate). Thermolysis also provided a means of furthercharacterising the mechanism of the RAFT process.A simple and efficient method for amino end-group analysis was developed thatinvolved in-situ derivatisation with trichloroacetyl isocyanate followed by 1HNMR analysis. The method was shown to be a suitable method for determininga wide range protic end-groups (NH2, OH, COOH) in synthetic polymers.Finally, metallocene polyolefin based coupling trials largely with controlledamino-functional polystyrene were conducted as an initial investigation into theproduction of high value added grafted polyolefins (and polyester). The graftingtrials were carried out on a small scale with a view to directing futureexperiments.

Subjects/Keywords: block; graft; copolymers

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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 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1717/SOURCE02?view=true

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 January 19, 2021. http://handle.unsw.edu.au/1959.4/32822 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1717/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Postma, Almar. “Approaches to the synthesis of block and graft copolymers with well defined segment lengths.” 2005. Web. 19 Jan 2021.

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 2021 Jan 19]. Available from: http://handle.unsw.edu.au/1959.4/32822 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1717/SOURCE02?view=true.

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 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1717/SOURCE02?view=true

University of New South Wales

29. Piloni, Alberto. Self-assembly of linear triblock glycopolymers into virus-like morphologies.

Degree: Chemistry, 2018, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/61981 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57898/SOURCE02?view=true

► The development of polymeric nanoparticles for biomedical applications, such as imaging and drug delivery, has been a flourishing area of research for many years. Self-assembly… (more)

▼ The development of polymeric nanoparticles for biomedical applications, such as imaging and drug delivery, has been a flourishing area of research for many years. Self-assembly of amphyphilic block copolymers can easily be achieved in water to produce remarkably homogeneous populations of particles with size ranging from tens to hundreds of nanometers. While polymers with two covalently connected blocks often results in spherical geometries and core-shell internal structure, linear triblock terpolymers can achieve more sophisticated morphologies with elongated shape, rough surface and compartmentalised core. The particle shape greatly influences its interaction with the cell membrane and serum proteins, having access to more complex morphologies can give a better understanding of the requirements in the design of an efficient drug carrier. A segregated core structure can also confer additional features to the nanoparticles. The compartments inside the micelles can solubilise different type of cargo in a similar way as transport proteins like serum albumins. For these reasons it is of great interest to develop a linear triblock terpolymer system that can form stable multicompartment micelles in aqueous solution. In this thesis ABC triblock glycopolymers are synthesised using RAFT polymerisation. The polymers are designed to have a hydrophilic sugar-functionalised block, a hydorphobic low-Tg block and a pH-responsive block. Using a step-wise process the polymers are self-assembled into small spherical micelles with a mixed corona, and successively into more sophisticated aggregates. The stimulus triggering the second step of the assembly is the change in solubility of the pH-responsive block upon adjustment of the acidity of the solution. Due to the chemical incompatibility between the core-forming blocks, segregated domains are formed within the nanoparticle and aggregation between them leads to the formation of superstructures with uncommon morphologies such as patchy spheres and caterpillars. Once a procedure to prepare the micelles has been perfected, their interaction with cells in vitro is investigated. This thesis furthers the understanding of the self-assembly of linear triblock glycopolymers in aqueous solution to improve morphological control and evaluates the applicability of these unconventional polymeric paricles as nanocarriers with a focus on the effect of shape and surface functionality. Advisors/Committee Members: Stenzel, Martina, Chemistry, Faculty of Science, UNSW.

Subjects/Keywords: Self-assembly; Block copolymers; Glycopolymers; RAFT polymerisation

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APA (6^th Edition):

Piloni, A. (2018). Self-assembly of linear triblock glycopolymers into virus-like morphologies. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/61981 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57898/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Piloni, Alberto. “Self-assembly of linear triblock glycopolymers into virus-like morphologies.” 2018. Doctoral Dissertation, University of New South Wales. Accessed January 19, 2021. http://handle.unsw.edu.au/1959.4/61981 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57898/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Piloni, Alberto. “Self-assembly of linear triblock glycopolymers into virus-like morphologies.” 2018. Web. 19 Jan 2021.

Vancouver:

Piloni A. Self-assembly of linear triblock glycopolymers into virus-like morphologies. [Internet] [Doctoral dissertation]. University of New South Wales; 2018. [cited 2021 Jan 19]. Available from: http://handle.unsw.edu.au/1959.4/61981 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57898/SOURCE02?view=true.

Council of Science Editors:

Piloni A. Self-assembly of linear triblock glycopolymers into virus-like morphologies. [Doctoral Dissertation]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/61981 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57898/SOURCE02?view=true

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

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

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

► The physical properties of n-alkyl acrylate copolymers, including thermal characteristics, structure as determined by small angle X-ray scattering, and gas permeability as a function of… (more)

▼ The physical properties of n-alkyl acrylate copolymers, including thermal characteristics, structure as determined by small angle X-ray scattering, and gas permeability as a function of temperature, were examined in detail and compared to the corresponding homopolymers. Two types of copolymers were examined: those with two crystalline comonomers and those with one crystalline and one non-crystalline comonomer. The crystalline / crystalline copolymers exhibit co-crystallization and, thus, for a given average side-chain length have comparable melting temperatures as the corresponding homopolymers. For a given side-chain length, the copolymers have somewhat lower heats of fusion than the corresponding homopolymers because of a reduction in crystallite size as revealed by SAXS. The crystalline / non-crystalline copolymers do not co-crystallize and experience melting point depression in which the non-crystalline comonomer does not affect the Tm and ∆Hf as much as two crystalline comonomers do. Though not entering the lattice, the non-crystalline comonomers impede the formation of perfect crystals, also reducing the crystallite size, as indicated by SAXS. This depression in crystallinity is reflected in the permeability data for the copolymers. Poly (n-alkyl acrylates) exhibit a ‘jump’ in their gas permeability at the Tm of the side-chain lengths that is mainly caused by a switch in the side-chain morphology from crystalline to amorphous upon 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 correlate with the melting endotherms for these polymers as determined by DSC. Ultimately, the melting endotherms for these copolymer systems provides an excellent tool for predicting permeability changes across the melting region. Advisors/Committee Members: Paul, Donald R. (advisor).

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…

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APA (6^th Edition):

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

Chicago Manual of Style (16^th Edition):

O'Leary, Kelly Ann. “Physical properties of poly (n-alkyl acrylate) copolymers.” 2005. Doctoral Dissertation, University of Texas – Austin. Accessed January 19, 2021. http://hdl.handle.net/2152/2327.

MLA Handbook (7^th Edition):

O'Leary, Kelly Ann. “Physical properties of poly (n-alkyl acrylate) copolymers.” 2005. Web. 19 Jan 2021.

Vancouver:

O'Leary KA. Physical properties of poly (n-alkyl acrylate) copolymers. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2005. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2152/2327.

Council of Science Editors:

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

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