手性主链液晶离聚物的液晶性能  

Mesomorphic Properties of Chiral Main-Chain Liquid-Crystalline Ionomers

作　　者：田梅[1] 丛越华 张宝砚[1] 李明超[1] 曲文忠[1] 

机构地区：[1]东北大学分子科学与工程中心,沈阳110004 [2]伦敦生物科学创新中心,伦敦NW1 OTU,英国

出　　处：《功能高分子学报》2009年第2期203-207,共5页Journal of Functional Polymers

基　　金：国家高技术发展计划(863计划)(2006AA02Z291);国家自然科学基金项目(50673105)

摘　　要：以6,6′-二羟基麦芽糖六乙酸酯(MA)、4,4′-对羟基联苯酚(MB)、2,5-二羟基苯甲酸(MC)、癸二酰氯(SD)为单体,采用溶液缩聚的方法合成了主链液晶离聚物。通过红外光谱、差示扫描量热及偏光显微等手段,研究了MC含量对液晶离聚物性能的影响。结果表明:液晶聚合物均为热致胆甾型,随MC含量的增加,其玻璃化转变温度、熔点和清亮点呈上升趋势,液晶相逐渐被破坏,羧酸离子的引入没有改变聚合物的液晶相类型。A series of main-chain liquid-crystalline ionomers （MLCIs） were prepared by solution polycondensation reactions using sebacyl chloride （SD）, 6, 6＇-hydroxy-hexa-O-acetyl-0633, β-maltose （MA）, 4, 4＇- hiphenyldid （ME） and 2, 5-dihydroxybenzoic （MC） as monomers. The mesomorphic properties of MLCIs were investigated by FT-IR, DSC and POM. Results show that MLCIs are thermotropic cholesteric liquid crystal polymers. Glass transition temperature, melting temperature and clearing point temperature increase with the increase of MC content. But the mesophase was destroyed with the increase of MC content. The introduction of ion does not change the type of mesophase.

关 键 词：主链液晶离聚物 羧酸 手性 麦芽糖 

分 类 号：O636.1[理学—高分子化学]