文献类型：期刊文献

英文题名：Controlled radical polymerization of methacrylates at ambient temperature and the synthesis of block copolymers containing methacrylates

作者：Wang, Xiao-Song[1]; Luo, Ning[1]; Ying, Sheng-Kang[1]

机构：[1]E China Univ Sci & Technol, Lab Living Polymerizat, Shanghai 200237, Peoples R China

年份：1999

卷号：40

期号：14

起止页码：4157

外文期刊名：POLYMER

收录：;EI(收录号：1999284676191);WOS:【SCI-EXPANDED(收录号:WOS:000082223800032)】；

语种：英文

外文关键词：controlled radical polymerization; block copolymers; copper halides

摘要：The controlled radical polymerization of methyl methacrylate (MMA) and 2-hydroxy ethyl methacrylate (HEMA) were successfully performed at ambient temperature. MMA was polymerized in acetonitrile with ethyl-2-bromopropionate (EPN-Br)/CuCl/2, 2'-bipyridyl (bpy) at 40 degrees C. The final polymer was with a narrow molecular weight distribution (M-w/M-n < 1.5) and controllable molecular weight. The controllable nature might have been contributed mainly by the high value of dielectric constant of acetonitrile. The bulk polymerization of HEMA, a monomer with a high value of dielectronic constant, can be well controlled with EPN-Br/CuCl/ bpy at 20 degrees C. The halogen terminated PMMA and PSt were then used as macroinitiators to copolymerize with some other monomers. As a result, some block copolymers, such as PMMA-b-PSt, PMMA-b-PHEMA and PSt-b-PHEMA, were synthesized. (C) 1999 Elsevier Science Ltd. All rights reserved.