文献类型：期刊文献

英文题名：Synthesis of block copolymers via transformation of living free-radical polymerization into living cationic ring-opening polymerization.

作者：Liu, Yanfei[1]; Ying, Shengkang[1]; Wan, Xiaolong[1]

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

年份：1999

卷号：218

期号：2

起止页码：U515

外文期刊名：ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：1999424778195);WOS:【SCI-EXPANDED(收录号:WOS:000082034001549)】；

语种：英文

外文关键词：Catalysis - Catalysts - Free radical polymerization - Gel permeation chromatography - Initiators (chemical) - Phase transitions - Polystyrenes - Ring opening polymerization - Silver compounds - Synthesis (chemical)

摘要：With allyl halides used as initiator, halogen-terminated polymers can be directly obtained through transitional metal catalyzed living free polymerization. Using AgClO4 as transformation catalyst, transformation of living free radical polymerization into living cationic ring-opening polymerization is performed. Poly(styrene-b-2-methyl-2-oxazoline) is obtained by two step method. AB and ABA type block copolymer of styrene and tetrahydrofuran is obtained by in-situ transformation correspond to the monofunctional or difunctional initiator used in the first polymerization stage.