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Novel synthesis of block copolymers via the RAFT process
Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007.
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| Format: | Thesis |
| Language: | English |
| Published: |
2008
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| _version_ | 1867614059560435712 |
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| access_status_str | Open Access |
| author | Bowes, Angela |
| author2 | Sanderson, R. D. |
| author_browse | Bowes, Angela Sanderson, R. D. |
| author_facet | Sanderson, R. D. Bowes, Angela |
| author_sort | Bowes, Angela |
| collection | Thesis |
| description | Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/2852 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:46:01.452Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/2852 Novel synthesis of block copolymers via the RAFT process Bowes, Angela Sanderson, R. D. McLeary, J. B. University of Stellenbosch. Faculty of Science. Dept. of Chemistry and Polymer Science. RAFT polymerization Block copolymers Addition polymerization Emulsion Dissertations -- Polymer science Theses -- Polymer science Chemistry and Polymer Science Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007. The synthesis of complex architectures, namely block copolymers with tailored enduse properties, is currently an important research area in academia and industry. The challenge is finding a versatile polymerization technique capable of controlling the molecular properties of the formed copolymers, which in turn determines their macroscopic properties. Reversible addition-fragmentation chain transfer (RAFT)- mediated living polymerization is a robust technique capable of producing controlled polymer products. With the great advances in living polymerization techniques and the environmental awareness of society there is an increasing demand to produce these polymer products via the RAFT living technique in heterogeneous media. Conventional emulsion and miniemulsion polymerization present various problems when used to produce polymers mediated by the RAFT process. There is an inherent need to find cost effective and flexible operating conditions to conduct RAFT polymerization in heterogeneous media with the ability to produce well-defined block copolymers. In this study the use of three novel trithiocarbonate RAFT agents to produce welldefined AB-type, ABA-type and star block copolymers via the RAFT process was investigated. Optimal operating conditions for the production of living block copolymers in homogenous and heterogeneous media were determined. The main focus was on the development of the RAFT process in heterogeneous media to efficiently produce block copolymer latex products. The RAFT-mediated miniemulsion polymerization system stabilized with non-ionic surfactants was thoroughly investigated. The ability of the ab initio and in situ RAFT-mediated emulsion polymerization systems to produce controlled latexes was demonstrated. Controlled block copolymer products were successfully synthesized in homogenous and heterogeneous media via the RAFT process when the optimum reaction conditions were chosen. 2008-06-30T13:02:48Z 2010-06-01T09:00:01Z 2008-06-30T13:02:48Z 2010-06-01T09:00:01Z 2007-12 Thesis http://hdl.handle.net/10019.1/2852 en application/pdf |
| spellingShingle | RAFT polymerization Block copolymers Addition polymerization Emulsion Dissertations -- Polymer science Theses -- Polymer science Chemistry and Polymer Science Bowes, Angela Novel synthesis of block copolymers via the RAFT process |
| title | Novel synthesis of block copolymers via the RAFT process |
| title_full | Novel synthesis of block copolymers via the RAFT process |
| title_fullStr | Novel synthesis of block copolymers via the RAFT process |
| title_full_unstemmed | Novel synthesis of block copolymers via the RAFT process |
| title_short | Novel synthesis of block copolymers via the RAFT process |
| title_sort | novel synthesis of block copolymers via the raft process |
| topic | RAFT polymerization Block copolymers Addition polymerization Emulsion Dissertations -- Polymer science Theses -- Polymer science Chemistry and Polymer Science |
| url | http://hdl.handle.net/10019.1/2852 |
| work_keys_str_mv | AT bowesangela novelsynthesisofblockcopolymersviatheraftprocess |