文档介绍：EUROPEAN
POLYMER
JOURNAL
European Polymer Journal 41 (2005) 933–940
ate/europolj
Synthesis of a novel star liquid crystal polymer
using trifunctional initiator via atom transfer
radical polymerization
Xing-Zhu Wang a, Hai-Liang Zhang a,*, Da-Chuan Shi a, Jian-Fang Chen a,
Xia-Yu Wang a, Qi-Feng Zhou b
a Institute of Polymer Science, College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, People’s Republic of China
b Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University,
Beijing 100871, People’s Republic of China
Received 4 November 2004; received in revised form 14 November 2004; accepted 16 November 2004
Abstract
In this paper, two types of three-arm star mesogen-jacketed crystal polymers (MJLCPs) with different core (that is
hard core and soft core) were synthesized by 2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene (MPCS), which was initi-
0 0
ated by two different trifunctional initiators 1,3,5-(2 -bromo-2 -methylpropionato)benzene (Ia) and 1,1,1-tris(2-bromo-
1
isobutyryloxymethyl)propane (Ib), respectively. Characterization of these polymers by H NMR and learly
supported the formation of a three-arm star-shaped PMPCS. The resulting three-arm star PMPCS possessed narrow
molecular weight distribution, and its molecular weight (Mn,NMR) agreed well with the theoretic