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Novel star-shaped polymeric architectures by copper (I) mediated living radical polymerisation
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Wong, Benjamin (2003) Novel star-shaped polymeric architectures by copper (I) mediated living radical polymerisation. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b1666051~S15
Abstract
This thesis has investigated the use of copper (I) mediated living radical polymerisation to form well-defined star-shaped polymers with a β-cyclodextrin core using the core- first approach.
Multifunctional initiators based on β-cyclodextrin were synthesised using appropriate protection and deprotection chemistry to precisely pre-determine the functionality. By the careful chemical modification of β-cyclodextrin, multifunctional initiators with precisely 21,14 and seven initiating sites could be synthesised.
Suitable reaction conditions to provide well-defined star-shaped methyl methacrylate and styrene using copper (I) mediated living radical polymerisation were determined for the multifunctional initiators. The extent of termination reactions by star-star coupling was minimised by using a low concentration of initiating species and employing relatively low reaction temperatures. The molecular weights of the star-shaped polymers were assessed using size exclusion chromatography and light scattering techniques. The linear polymeric arms could be independently assessed by cleaving them from the β-cyclodextrin core and analysing them using size exclusion chromatography.
Highly-ordered porous membrane structures are formed from star-shaped poly(styrene) polymers under certain humid conditions. The optimum conditions for the formation of these honeycomb structures have been investigated and the factors that affect the pore- size have been determined. Functionalisation of the pores were also investigated.
| Item Type: | Thesis (PhD) | ||||
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| Subjects: | Q Science > QD Chemistry | ||||
| Library of Congress Subject Headings (LCSH): | Polymers, Copper catalysts, Polymerization | ||||
| Official Date: | 2003 | ||||
| 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| Publication Status: | Unpublished | ||||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: | Engineering and Physical Sciences Research Council | ||||
| Extent: | xxvii, 201 leaves | ||||
| Language: | eng |
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