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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

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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 or Dissertation (PhD)
Subjects: Q Science > QD Chemistry
Library of Congress Subject Headings (LCSH): Polymers, Copper catalysts, Polymerization
Official Date: 2003
Dates:
DateEvent
2003UNSPECIFIED
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Publication Status: Unpublished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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