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Controlled Synthesis of Alternating Copolymers by RAFT Copolymerization of N-Vinylphthalimide with N-Isopropylacrylamide

✍ Scribed by Yuya Maki; Hideharu Mori; Takeshi Endo

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
472 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

A nonconjugated N‐vinyl monomer, N‐vinylphthalimide (NVPI), was copolymerized with various comonomers via reversible addition‐fragmentation chain transfer (RAFT) process. Two different chain transfer agents (CTAs), O‐ethyl‐S‐(1‐ethoxycarbonyl) ethyldithiocarbonate (CTA 1) and benzyl 1‐pyrrolecarbodithioate (CTA 2), were compared for these copolymerizations with 2,2′‐azobis(isobutyronitrile) as an initiator. The effects of the nature of CTA, the comonomer structure, and solvent on the copolymerization were investigated in terms of the controlled character of the copolymerization and alternating structure. The copolymerization of NVPI and N‐isopropylacrylamide using CTA 2 in DMF or MeOH afforded well‐defined copolymers with predominantly alternating structure, controlled molecular weights, and low molecular mass distributions.

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