带有磺酸基团侧链液晶离聚物的液晶性能  

Mesomorphic Properties of Side-Chain Liquid Crystalline Ionomers Containing Sulfonic Acid Groups

作　　者：臧宝岭[1] 刘鲁梅[1] 张宝砚[1] 周爱娟[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2003年第2期194-197,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目前期专项研究资助项目 ;国家自然科学基金资助项目 ( 2 98740 0 7)

摘　　要：一种新型的手性近晶液晶单体 (ML) 4 二羟基二苯基 4′ (2 乙基 ) 己酰基 对 烯丙氧基苯甲酸酯和离子单体 (MI) 4 烯丙氧基偶氮苯磺酸被接枝到含氢硅氧烷链上 ,得到系列含有不同摩尔比的ML 和MI 的液晶聚合物P1～P6·用红外光谱仪 (FTIR)、差热扫描量热仪 (DSC)、热重分析仪 (TGA)、偏光显微镜 (POM )、X射线分析 (WAXD ,SAXS)等对其结构和性能进行了表征·表明P1展现了向列型液晶织构 ,P2 ～P6为近晶型液晶织构 ;离子的引入没有改变液晶类型 ,但是清亮点 (ti)随着离子浓度的增加而增加·A novel chiral smectic mesogenic monomer, 4-allyloxy-benzoyl-4′-[5-(2-ethyl)hexanoyl] p-benzenediol bisate (M L) and ionic monmer, 4-alloyloxy-4′-phenylazobenzene sulfonic acid (M I) were grafted upon to the backbone of polymethylhydrosiloxane (PHMS) with different molecular weight radio of M L and M I. The microstructures and properties of the series of the polymers (P 1～P 6) were characterized by FTIR, DSC, TGA, POM, WAXD and SAXS. It is indicated that the P 1 exhibites nematic texture and the P 2～P 6 exhibite smectic texture. The t i is increased with increasing concentration of ionic groups in polymer chain from P 2～P 6, but the types of mesogenic phase of liquid crystal ionomers is not changed comparing with that of the P 2 without ionic groups.

关 键 词：液晶性能 磺酸 液晶离聚物 手性 近晶相 向列相 焦锥织构 

分 类 号：O631.1[理学—高分子化学] O753.2[理学—化学]