含手性碳的串型液晶共聚物的合成与表征

SYNTHESIS AND CHARACTERIZATION OF SHISH KEBAB TYPE LIQUID CRYSTALLINE COPOLYMER WITH CHIRAL CARBONS

以对苯二甲酰氯 ,2 ,5 -二 [4- ((S) - 3-甲基戊氧基 )苯甲酰氧基 ]对苯二酚和 1,10 -癸二醇为单体 ,采用溶液共缩聚的方法 ,合成了一系列新的含手性碳的串型液晶共聚物。共聚物通过 GPC、DSC、TG、WAXD、偏光显微镜和旋光仪等方法表征。发现所有的共聚物加热至各自的熔点以上都能形成液晶态 ,在液晶态可以观察到破碎焦锥织构或沙地织构。通过变温 X射线衍射证明它们为手性近晶 C(S*c )相。所有共聚物的熔点 (Tm)和液晶态清亮点 (Ti)随共聚物分子中 1,10 -癸二醇用量的改变呈规律性变化。共聚物有很高的旋光性 。

A novel class of shish kebab type liquid crystalline copolymers with chiral carbons was synthesised via solution polycondensation from terephaloyl chlorid with 2,5 bis[4 ((S) 3 methylpentyloxy) benzolyloxy] hydroquinone and 1,10 decandiol. The copolymers were characterized by GPC,DSC,TG,WAXD polarizing macroscope with heating stage and rotation analysis instrument. It was found that all the copolymers went to liquid crystal phase when heated to their T m. The broken focal conics texture or sand texture can be observed. Temperature variable X ray diffraction realized that they are chiral smetic C phase. Both melting temperature( T m) and isotorpization temperature( T i) chang regularly with varying the 1,10 decandiol unit content in the copolymers. It was found that rotation was maintained during the synthesis process and all the chiral copolymers were optical highly active.