侧链含介晶基团的聚硅氧烷的合成及其液晶性质

侧链含介晶基团的聚硅氧烷的合成及其液晶性质 STUDIES ON THE SYNTHESIS AND LIQUID CRYSTALLINE PROPERTIES OF POLYSILOXANES WITH MESOGENIC SIDE GROUPS 卓仁禧 Zhuo Renxi 1 2 first-author 刘高伟 Liu Gaowei 1 2 王恒 Wang Heng 1 2 Department of Chemistry Wuhan University Department of Chemistry Wuhan University Department of Chemistry, Wuhan University Department of Chemistry, Wuhan University Department of Chemistry Wuhan University Department of Chemistry Wuhan University 本文报道了以聚硅氧烷为主链的两种类型的侧链型聚合物液晶的合成。其中一种的介晶基团为棒状的苯甲酸对甲氧基苯酯;另一种为胆固醇酯。我们对聚合物液晶和小分子液晶进行了红外光谱、核磁共振谱和元素分析鉴定。并且对它们的液晶相行为通过热台偏光显微镜、DSC进行了表征,同时对其液晶态的稳定状况进行了分析。 This paper describes the synthesis of liquid crystalline polysiloxanes with p-benzoyl-p-methoxyl phenyl ester or cholesteric ester side groups. The chemical structures of terminal olefinic esters and the liquid crystalline polysiloxanes were confirmed by 1 H NMR, IR and elemental analysis. Their phase behaviour was studied by polarization microscopy and DSC measurements. Experimental results also showed that the lengthening of the spacer would cause an increase of the stability of the liquid crytalline phase. On the other hand, the introduction of dimethylsiloxy unit into the backbone chain would decrease the stability of the liquid crystalline phase. 聚合物液晶 聚硅氧烷 介晶基团 相转变温度 Liquid csystalline polymer polysiloxane mesogenic group phase transition temperature 1988-02-01 2021-04-01 2