Novel difunctional reversible addition fragmentation chain transfer (RAFT) agent for the synthesis of telechelic and ABA triblock methacrylate and acrylate copolymers

被引：28
|
作者：
Legge, Thomas M.
Slark, Andrew T.
Perrier, Sebastien [1 ]
机构：
[1] Univ Leeds, Dept Colour & Polymer Chem, Leeds LS2 9JT, W Yorkshire, England
[2] Natl Adhes ICI, Slough SL2 5DS, Berks, England
来源：
MACROMOLECULES | 2007年 / 40卷 / 07期
关键词：
D O I：
10.1021/ma061372g
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The design of a novel difunctional chain transfer agent (CTA) based on the propagating core (R group) approach is detailed. Successful synthesis of ABA block copolymers of poly(butyl methacrylate)-b-poly(methyl methacrylate)-b-poly(butyl methacrylate) and poly(butyl acrylate)-b-poly(methyl methacrylate)-b-poly(butyl acrylate) with targeted molecular weight and polydisperity indices in the range 1.2-1.4 is reported. The effect of free radical initiator concentration with respect to CTA concentration on block efficiency is investigated and lower concentrations were found to increase reaction time, but significantly reduce termination reactions. The consequence of difunctionality on homo and block extension polymerizations is discussed, with the polymerization of methyl and butyl methacrylate being more controlled than butyl acrylate.
引用
收藏
页码：2318 / 2326
页数：9
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