Synthesis and characterization of four-armed star mesogen-jacketed liquid crystal polymer

被引：35

作者：

Wang, XZ ^{[1
]}

Zhang, HL ^{[1
]}

Zhong, GQ ^{[1
]}

Wang, XY ^{[1
]}

机构：

[1] Xiangtan Univ, Inst Polymer Sci, Xiangtan 411105, Peoples R China

来源：

POLYMER | 2004年 / 45卷 / 11期

关键词：

mesogen-jacketed liquid crystal polymer; atom transfer radical polymerization; star-shaped polymer;

D O I：

10.1016/j.polymer.2004.02.054

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 synthesis of four-armed star mesogen-jacketed liquid crystal polymer was achieved by atom transfer radical polymerization in chlorobenzene solution using pentaerythritol terakis(2-bromoisobutyrate) (PT-Br) as an initiator and CuBr/sparteine complex as a catalyst. The results show that the number average molecular weigh is creased linearly vs. monomer conversion, and that the polydispersities were quite narrow (< 1.19). which is the character of controlled polymerization. The structure was experimentally confirmed by H-1 NMR. The liquid-crystalline behavior of the four-armed star polymer was studied using DSC and POM. Only the polymer with a M-n.GPC beyond 3.68 x 10(4) g/mol formed a liquid crystalline phase which was quite stable with a high clearing point. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：3637 / 3642

页数：6