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Functional polymers from controlled polymerisation
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Chang, Yujing (2023) Functional polymers from controlled polymerisation. PhD thesis, University of Warwick.
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WRAP_Theses_Chang_2023.pdf - Submitted Version Embargoed item. Restricted access to Repository staff only until 22 August 2025. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (7Mb) |
Official URL: http://webcat.warwick.ac.uk/record=b3973347~S15
Abstract
In the first part, a group of donor-acceptor conjugated polymers that could be utilised as the donor material in the field of organic photovoltaics were synthesised via palladium-catalysed Stille polycondensation. As a starting point, the reaction conditions including temperature, solvent and heating method were optimised to achieve high molecular weight products. Subsequently eight phosphorous ligands with different steric hinderance and electron donating abilities were selected to investigate the ligands effect of conjugated polymers properties. Then the backbone sequences of conjugated polymers were adjusted by controlling the degree of polymerisation and the monomer ratios. The resultants were characterised by high temperature gel permeation chromatography and proton nuclear magnetic resonance spectroscopy, and the energy levels were determined by solution and film UV-vis spectroscopies and cyclic voltammetry. The thermal stabilities of materials were also recorded by thermogravimetric analysis.
The focus of second part was to produce well-defined fluorescently labelled polymers with Cu mediated reversible deactivation radical polymerisation. Hostasol-bib initiator was initially synthesised and utilised for homopolymerisation with different monomers including methyl acrylate, tert-butyl acrylate (t-BA), lauryl acrylate, and the hydrophilic poly(ethylene glycol) methyl ether acrylate (PEGA). Following different DPs P(t-BA)s were synthesised then hydrolysed into hydrophilic poly(acrylic acid)s and the fluorescent properties were compared. Finally, a series of Hostasol-P(tBA)-co-P(PEGA) copolymers were produced, and the wrinkling behaviour of polymer surface were records by scanning electron microscope.
Item Type: | Thesis (PhD) | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Polymers, Polymerization, Conjugated polymers, Photovoltaic power generation | ||||
Official Date: | February 2023 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | Department of Chemistry | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Haddleton, David M. | ||||
Sponsors: | Merck Research Laboratories | ||||
Format of File: | |||||
Extent: | xxiii, 185 pages : illustrations, charts | ||||
Language: | eng |
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