期刊
MACROMOLECULES
卷 44, 期 2, 页码 240-247出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma102313q
关键词
-
资金
- NSF [CHE-07-15494, DMR-0549353]
- CRP Consortium at Carnegie Mellon University
- Astrid and Bruce McWilliams Fellowship
A novel approach to prepare cyclic polymers via a combination of atom transfer radical polymerization (ATRP) and atom transfer radical cross-coupling (ATRC) is presented. A functional ATRP initiator possessing an alkoxyamine group was synthesized and used to prepare well-defined-linear telechelic alpha-nitroxy,omega-bromo homo- and block copolymers via ATRP and subsequent thermal deprotection of the alpha-terminal nitroxide function. Cyclization reactions were achieved by intramolecular AT RC under high dilution. Ring expansion of a cyclic polystyrene alkoxyamine prepared by ATRC was conducted via nitroxide-mediated polymerization (NMP) of styrene and yielded a mixture of linear and cyclic polycondensates. This result is discussed in detail and explained by the persistent radical effect (PRE), thermal initiation, and the occurrence of radical crossover reactions during chain extension via NMP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据