含异山梨醇和胆甾醇的侧链胆甾型液晶聚合物的合成与表征

异山梨醇类单体和胆甾类液晶单体与聚甲基含氢硅氧烷（PMHS）接枝共聚合成系列新型胆甾型侧链液晶聚合物。运用红外光谱（FTIR）、核磁共振谱（1HNMR）、差示扫描量热分析（DSC）、热失重分析法（TG）和偏光显微分析法（POM）等进行表征。单体M1和M2在升、降温过程中均呈现胆甾相液晶织构，聚合物P1～P7为胆甾相液晶。实验结果髭示，较低的玻璃化转变温度使得聚合物具有广阔的应用前景，随着胆甾液晶组分的增加，聚合物的玻璃化转变温度降低，清亮点先降低后升高，液晶相范围起初变化缓慢后变化很快。

Side-chain Cholesteric Liquid Crystalline Polymers Containing Cholesterol and Isosorbide-Synthesis and Characterization

A series of new cholesteric side-chain liquid crystalline polymers were prepared containing chotesteric monomer and isosorbide monomer. All polymers were synthesized by graft polymerization using polymethyl-hydrosiloxane as backbone. The mesomorphic properties were investigated by FTIR, 1HNMR, DSC, TG and POM. M1 and M2 both showed cholesteric liquid crystalline texture during the heating and the cooling cycle, and PI-P7 was eholesteric phase. Experimental results demonstrated that lower glass-transition temperature offered the possibility of extensive application, and the glass-transition temperatures reduced and isotropization temperatures first reduced then increased, and the ranges of the mesophase temperature changed smoothly at first and then abruptly with increasing the content of cholesteric agent.