胆甾醇或薯蓣皂素封端的聚三亚甲基碳酸酯及其液晶性能研究  

Preparation and Liquid Crystal Properties of the Poly(trimethylene carbonate)End-Capped by Cholesteryl or Diosgenin Derivatives

作　　者：徐孝旭 于永鹏 陈贵祥 陈超先 路艳华 XU Xiao-xu;YU Yong-peng;CHEN Gui-xiang;CHEN Chao-xian;LU Yan-hua(School of Chemical Engineering and Machinery,Eastern Liaoning University,Dandong 118003,China;Center for Molecular Science and Engineering,Northeastern University,Shenyang 110004,China)

机构地区：[1]辽东学院化工与机械学院,丹东118003 [2]东北大学分子科学与工程中心,沈阳110004

出　　处：《高分子通报》2021年第11期35-41,共7页Polymer Bulletin

基　　金：国家自然科学基金(51873084);辽宁省教育厅科技项目(LNSJYT202014)。

摘　　要：利用扩链反应活化了胆甾醇或薯蓣皂素端羟基的反应活性,制备了基于胆甾醇或薯蓣皂素衍生物的甾体化合物,并以其为引发剂引发了三亚甲基碳酸酯(TMC)的本体开环聚合反应,制备了胆甾醇或薯蓣皂素封端的聚三亚甲基碳酸酯,采用核磁(^(1)H-NMR)、差示扫描量热仪(DSC)和偏光显微镜(POM)等手段对其结构及液晶性能进行测试表征。结果表明:胆甾基元或薯蓣皂素基的引入赋予了聚三亚甲基碳酸酯液晶性能,且液晶基元的结构对其液晶性能具有显著影响。To enhance the reactivity of the terminal hydroxyl groups of cholesterol or diosgenin,the cholesteryl or diosgenin derivatives were prepared by chain extension reaction,which was used as initiators to initiate the ring-opening polymerization of trimethylene carbonate(TMC).Two kinds of main-chain polycarbonate liquid crystals with different liquid crystal motifs were prepared.The structure and properties of the obtained liquid crystal polymers were tested and characterized by means of hydrogen-1 nuclear magnetic resonance(^(1)H-NMR),differential scanning calorimetry(DSC)and polarizing microscope(POM).The results show that the introduction of cholesteric or diosgenin gives polytrimethylene carbonate a liquid crystal property,and the structure of the liquid crystal motifs has a significant influence on its liquid crystal properties.

关 键 词：三亚甲基碳酸酯 胆甾醇 薯蓣皂素 液晶聚合物 

分 类 号：TQ317[化学工程—高聚物工业]