羧基遥爪热致性主链液晶离聚物的合成与表征  

Synthesis of Thermotropic Main-Chain Liquid Crystalline Ionomer Containing Telechelic Groups

作　　者：黎前跃[1] 钟启智[2] 张羽中 张宝砚[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004 [2]沈阳化工学院材料科学与工程学院,辽宁沈阳110142

出　　处：《高分子材料科学与工程》2007年第6期81-84,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20374009)

摘　　要：以对羟基苯甲酸甲酯和1，4-丁二醇为主要原料，经熔融酯交换合成介晶基元双（对羟基苯甲酸）丁二醇酯（BBHB）；以四氯乙烷为溶剂，采用溶液缩聚法将BBHB与适量的对苯二甲酰氯（TPC）反应，经Na2CO3溶液处理，合成端基为羧基的液晶离聚物。通过红外光谱等分析对它们的化学结构进行了表征。表明：所合成的液晶离聚物P1～P3为纹影织构，属于典型的向列型液晶，液晶相区间为100℃左右，羧基对液晶区间和玻璃化转变温度（Tg）、熔融温度（Tm）、相转变温度（Tc）影响不大。Bis （p-hydroxybenzonic acid） butanediolate （BBHB）as mesogenic unit was prepared with methyl -p-hydroxybenzoate, 1,4-butanediol and catalyzer by melting transesterification. Then liquid crystalline polymer was synthesized with excessive tcrephthaloyl chloride and BBHB by solution polycodensation,using tetrachloroethane as solvent. Thermotropic main-chain liquid crystalline polymer was synthesized. This liquid crystalline polymer was characterized by means of FT-IR. Photographs of polarizing microscope show that this liquid crystalline polymer is nemarie liquid crystalline polymer. The chemical structure, thermal properties and liquid crystalline character of polymers P1-P3 were analyzed with IR, POM, DSC and WAXD, the final result shows the polymers P1-P3 are kinds of nematic liquid crystals, able to keep the state of liquid crystal properties unless reach to each decomposed temperatures.

关 键 词：遥爪 主链 液晶离聚物 向列型 溶液缩聚 

分 类 号：O631.1[理学—高分子化学]