SYNTHESIS AND CHARACTERIZATION OF SEGMENTED COPOLYMERS OF AROMATIC POLYETHER SULFONE AND A THERMOTROPIC LIQUID-CRYSTALLINE POLYESTER

被引:45
作者
AUMAN, BC
PERCEC, V
机构
[1] Case Western Reserve Univ, United States
关键词
Aromatic Polymers - Crystals; Liquid; -; Polyesters; Polyethers; Thermodynamics;
D O I
10.1016/0032-3861(88)90159-0
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 bulk copolycondensation of α,ω-di(acetoxy) aromatic polyether sulphone (PSU) with chlorohydroquinone diacetate and trans-1,4-cyclohexanedicarboxylic acid to produce segmented copolymers of amorphous PSU and thermotropic liquid crystalline poly(chloro-1,4-phenylene-transcyclohexane dicarboxylate)(PCPPCD) is described. For PSU with M¯n=1400, true block copolymers were formed with PSU segments incorporated into the thermotropic liquid crystalline polyester structure. For PSU with M¯n&le2300, however, the products were not true block copolymers, but rather blends of PSU chain extended by short PCPTCD segments and PCPTCD homopolymer. This result can be explained by an 'apparent' molecular weight dependent reactivity of the α,ω-di(acetoxy)PSU chain ends, which is in fact the consequence of the immiscibility of the amorphous and liquid crystalline phases.
引用
收藏
页码:938 / 949
页数:12
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