含X-型二维液晶基元和冠醚环的液晶共聚酯的研究  

Study of Liquid Crystalline Copolyesters with X-Shaped Two-dimensional Mesogenic Units and Crown Ether Cycle

作　　者：张淑媛[1] 徐晓辉[2] 王经武[2] 杜洋[2] 李晓威[2] 王鹏飞[1] 李自法[2] 

机构地区：[1]郑州大学化学系,郑州450052 [2]郑州大学材料工程学院,郑州450052

出　　处：《化学学报》2007年第8期755-759,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.29974026);河南省自然科学基金(No.0211021100);河南省教育厅自然科学基金(No.20021500004)资助项目。

摘　　要：合成了一系列新的含X-型二维液晶基元和反式-4,4′-双(4-羟基苯基偶氮)二苯并-14-冠-4冠醚环的主链型液晶共聚酯.通过GPC,[η],DSC,TG,WAXD和POM对其液晶性研究发现,所有的共聚酯都呈现出向列相的丝状织构或纹影织构。共聚酯的熔融温度(T_m)和各向同性温度(T_i)随共聚酯分子中反式-4,4′-双(4-羟基苯基偶氮)二苯并-14-冠-4用量的改变呈规律性变化。A novel series of main chain liquid crystalline copolyesters with X-shaped two-dimensional mesogenic units and crown ether cycles of trans-4,4＇-bis（4-hydroxyphenylazo）dibenzo-14-crown-4 were synthesized and their mesomorphic properties were studied through GPC, [η], DSC, TG, WAXD and POM. It was found that all the copolyesters showed the thread texture or schlieren texture. Their melting temperature （Tm） and isotropization temperature （TO were changed regularly with varying the trans-4,4＇-bis- （4-hydroxyphenylazo）dibenzo- 14-crown-4 unit content in the copolyesters.

关 键 词：X-型二维液晶基元 二苯并-14-冠-4 液晶共聚酯 冠醚环 

分 类 号：O633.14[理学—高分子化学]