4,4’-对苯二甲酰基二氧二苯甲酸与脂二醇的共聚及液晶性能研究  

POLYCONDENSATION OF 4,4-TEREPHTHALOYDIOXYBENZOYL CHLORIDE ANE ALIPHATIC DIOLS AND STUDIES ON THE LIQUID CRYSTALBEHAVIOR OF THE COPOLYESTERS

作　　者：由英才[1] 焦华[1] 郝济远 张保龙[1] 杜宗杰[1] 

机构地区：[1]南开大学高分子化学系,天津300071

出　　处：《离子交换与吸附》1999年第2期121-126,共6页Ion Exchange and Adsorption

基　　金：国家自然科学基金!59473028;天津自然科学基金!941408002

摘　　要：以对苯二甲酸和对羟基苯甲酸为起始原料合成了液晶单体4，4’-对苯二甲酰二氧二苯甲酰氯（TOBC），用TOBC分别与癸二醇-1，10，己二醇-1，6，戊二醇-1，5，丁二醇-1，4和乙二醇进行缩聚反应，生成了一系列主链型热致液晶共聚酯。用DSC、热台偏光显微镜和X-射线衍射仪等对合成的共聚酯的液晶行为进行了表征，结果表明，合成的共聚酯均为向列型热致液晶，其液晶温度范围在20℃－68℃之间，并随着脂肪族二醇中亚甲基（CH2）单元的增加，共聚酯的熔融转变温度（Tm）和各向同性温度（Ti）均有规律的变化。表明主链型液晶共聚酯分子中柔性间隔基的大小对共聚酯的液晶性质有着明显的影响。Five regular aromatic-aliphatic copolyesters were synthesized by solution polycondensationof 4,4-rterephthaloydioxybenzoyl chloride (TOBC) with glycol,butanediol-1,4, Pentandiol-1,5,hexanediol-1,6 and decanediol-1, 10 respectively.The copolyesters were characterized by polarized microscopy with hot stage,DXC and Xray diffraction, it was found that all synthesized copolyesters are thermotropic nematic liquid crystal with broader mesomorphic temperature range (20℃~68℃).The melting temperature of copolyesters vary from 200-300℃ with the change in molecular structure of the copolyestersand melting temperature was higher for copolyester containing an odd number of methylene unit than containing an even number of unit.

关 键 词：热致液晶 共聚酯 TOBC 液晶高分子 

分 类 号：O753.2[理学—晶体学]