聚硅氧烷侧链液晶高分子的合成与表征

研究以对－烯丙氧基苯甲酸对－氰基苯酚酯为单体的聚硅氧烷侧链液晶高分子的合成方法。首先利用Williamson反应生成醚、羧酸酰化、酯化反应得到单体，然后利用硅氢化反应将单体接枝到聚甲基氢硅氧烷上得到目标产物。用IR，NMR及热台偏光显微镜等方法对单体和聚合物进行了结构表征和液晶行为分析。优化了对－烯丙氧基苯甲酸对－氰基苯酯为单体的聚硅氧烷侧链液晶高分子的合成工艺条件，提高了产率。样品表征结果证明单体和聚合物均呈现近晶液晶相，为特殊功能材料提供了原料。

Synthesis and Characterization of A Liquid Crystalline Polysiloxane

A side chain liquid crystalline polysiloxane with p (allyloxy)benzoxy p cyanophenyl as a monomer was synthesized. The monomer was firstly prepared by Williamson reaction, chloride of acid and esterification, then liquid crystalline polysiloxone was prepared by grafting reaction of the monomer, in addition, the chemical structure of the monomer and polymer was confirmed by IR and 1H NMR analysis, and the phase behavior was observed by DSC and optical polarized microscoly. The best synthetic technical conditions of a side chain liquid crystalline polysiloxane with p (allyloxy)benzoxy p cyanophenyl as a monomer has been researched, rate of production was increased, the monomer and polymer were confirmed to exhibit smectic liquid crystal behavior by analytic results of productions. It can provide stuff for special function materials.