SYNTHESIS AND CHARACTERIZATION OF SOME THERMOTROPIC LIQUID CRYSTALLINE POLYAMIDES

被引：0
|
作者：
周德亮
张东
Samuel K.L.TAH
周其凤
机构：
[1] Beijing 100871
[2] China
[3] Department of Polymer Science & Engineering College of Chemistry
[4] Peking University
来源：
Chinese Journal of Polymer Science | 1997年 / 04期
基金：
中国国家自然科学基金;
关键词：
Thermotropic liquid crystals; Mesogenic polyamides; Nematic mesophase;
D O I：
暂无
中图分类号：
TQ317 [高分子化合物产品];
学科分类号：
0805 ; 080502 ;
摘要：
A series of novel mesogenic polyamides containing a flexible pendent side group wassynthesized by solution condensation polymerization. The new monomers, diacids and di-amines containing flexible elements of diferent lengths, were also synthesized and character-ized by;HNMR, mass spectroscopy and elemental analysis. The polymers were character-ized by viscosity measurements, differential scanning calorimetry （DSC）, X-ray diffiactionand polarizing optical microscopy These studies revealed that polyamides containingflexible elements of a sufficient length exhibited thermotropic liquid crystalline（LC） pro-perties. The melting temperatures of this series of polymers were particularly sensitive tothe length of the flexible segment on the main chain and that of the flexible pendent esterside chain. Lyotropic LC behaviours were also observed in solution.
引用
收藏
页码：353 / 361
页数：9
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