手性近晶C相串型液晶共聚物的合成与性能  

SYNTHESIS AND PROPERTIES OF SMECTIC C PHASE SHISH-KEBAB TYPE LIQUID CRYSTALLINE COPOLYMERS

作　　者：李自法[1] 张淑媛[1] 郑世军[1] 何可可[1] 朱红杰[1] 王四峰[1] 周其凤[2] 

机构地区：[1]郑州大学材料工程系,河南郑州450052 [2]北京大学化学学院高分子科学与工程系,北京100871

出　　处：《高分子材料科学与工程》2001年第5期50-53,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目

摘　　要：以对苯二甲酰氯 ,2 ,5 -二 [4 - ((S) - 2 -甲基丁氧基 )苯甲酰氧基 ]对苯二酚和三缩四乙二醇为单体 ,采用低温溶液缩聚的方法 ,合成了一系列新的手性近晶 C相串型液晶共聚物。通过 DSC、偏光显微镜、WAXD和旋光分析等方法 ,发现所有的手性共聚物都有光活性 ,当加热至熔融温度以上时形成近晶 C相。共聚物的熔融温度 (Tm)和各向同性温度 (Ti)随共聚物分子中三缩四乙二醇用量的改变呈规律性变化。A new series of chiral smectic C phase shish-kebab type liquid crystalline copolymers was synthesised by low temperature solution polycondensation of terephthaloyl chlorid with 2,5-bis[4-((S)-2-methylbutoxy) benzoyloxy]hydroquinone and tetraethylene-glycol. By means of the differential scanning calorimetry, the polarizing optical microscopy, the wide angle X-ray scattering, as well as the polarimetric analysis. The results show that the chiral copolymers are optically active and a smectic C phase are formed when being heated to above their melting temperatures. Both melting temperature(T m) and isotropization temperatures(T i) change regularly with varying the tetraethylene-glycol content in the copolymers.

关 键 词：合成 手性近晶C相 串型 液晶共聚物 性能 

分 类 号：O631.1[理学—高分子化学] O753.2[理学—化学]