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Synthesis and properties of polydimethylsiloxane-containing block copolymers via living radical polymerization
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UNSPECIFIED (2001) Synthesis and properties of polydimethylsiloxane-containing block copolymers via living radical polymerization. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 39 (11). pp. 1833-1842. ISSN 0887-624X
Full text not available from this repository.Abstract
Polydimethylsiloxane (PDMS) block copolymers were synthesized by using PDMS macroinitiators with copper-mediated living radical polymerization. Diamino PDMS led to initiators that gac-e ABA block copolymers, but there was low initiator efffciency and molecular weights are somewhat uncontrolled. The use of mono- and difunctional carbinol-hydroxyl functional initiators led to AB and ABA block copolymers with nar row polydispersity indices (PDIs) and controlled number-average molecular weights (M-n's). Polymerization with methyl methacrylate (MMA) and X-dimethyl aminoethyl methacrylate (DMAEMA) was discovered with a range of molecular weights produced. Polymerizations proceeded with excellent first-order kinetics indicative of living polymerization. ABA block copolymers with MMA were prepared with between 28 and 84 wt % poly(methyl methacrylate) with M-n's between 7.6 and 35 K (PDI <1.30), which show thermal transitions characteristic of block copolymers: ABA block copolymers with DMAEMA led to amphiphilic block copolymers with M-n's between 9.5 and 4.5.7 K (PDIs of 1.25-1.70), which formed aggregates in solution with a critical micelle concentration of 0.1 g dm(-3) as determined by pyrene fluorimetry experiments. Monocarbinol functional PDMS gave AB block copolymers with both MMA and DMAEMA. (C) 2001 John Wiley & Sons, Inc.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Journal or Publication Title: | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY |
| Publisher: | JOHN WILEY & SONS INC |
| ISSN: | 0887-624X |
| Date: | 1 June 2001 |
| Volume: | 39 |
| Number: | 11 |
| Number of Pages: | 10 |
| Page Range: | pp. 1833-1842 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/12203 |
Data sourced from Thomson Reuters' Web of Knowledge
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