AROMATIC THERMOTROPIC LIQUID CRYSTALLINE POLYMERS FROM 1,3-BIS[4-(4-AMINOPHENOXY)-ALPHA,ALPHA-DIMETHYLBENZYL]BENZENE

摘要

Polymers were synthesized with 1,3-bis[4-(4-aminophenoxy)-alpha,alpha-dimethylbenzyl]benzene by polycondensation of pyromellitic dianhydride (PMDA), phthaloyl chlorides and trimellic anhydride chloride (TAC). Their possible use as aromatic thermotropic liquid crystalline polymers was investigated. The polyamide from terephthaloyl chloride (TPC), and the copolyamideimide from PMDA and TPC, showed thermotropic liquid crystalline properties according to the results of differential scanning calorimetry and observations from polarization microscopy. However, neither the polyamide from isophthaloyl chloride nor the polyamideimide from TAC exhibited liquid crystalline properties. (C) 1997 Elsevier Science Ltd. [References: 6]