东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (1): 110-113.DOI: -

• 论著 • 上一篇    下一篇

含吸电子基的手性液晶聚合物合成和性能

何晓智;穆强;赵静;张宝砚;   

  1. 东北大学理学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    中央高效基本科研业务费专项资金资助项目(N090405005);;

Synthesis and properties of chiral liquid crystal polymers containing electron-withdrawing group

He, Xiao-Zhi (1); Mu, Qiang (1); Zhao, Jing (1); Zhang, Bao-Yan (1)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Zhang, B.-Y.
  • About author:-
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摘要： 设计与合成含胆甾醇基的液晶单体(4-烯丙氧基苯丙酸胆甾醇酯(M1)与含氰基的液晶单体(4-十一烯酰氧基联苯氰酯(M2)),并将其以一定比例投料与聚甲基含氢硅氧烷(PMHS)接枝共聚,合成了一系列含吸电子基的手性侧链液晶聚合物.通过热分析、偏光显微分析、旋光仪等测试手段研究了单体M1,M2和手性液晶聚合物液晶性能.结果表明M1为胆甾型液晶单体,M2为向列液晶单体.聚合物P1为近晶相液晶聚合物,P2~P8为手性近晶A相液晶聚合物.随着M1含量的增加,聚合物的玻璃化转变温度、清亮点温度均呈现增大趋势,液晶相范围较宽.

关键词: 手性, 胆甾相, 聚合物, 合成, 油丝织构

Abstract: The liquid crystalline monomers: M1 (4-allyloxy-phentylpropionyloxycholesterol ester) and M2 (4-undecanoyloxy-4-cyanogen-biphenyl ester) were synthesized. Then, a series of chiral liquid crystalline polymers containing electron withdrawing groups were prepared via graft copolymerization with the dosages of M1, M2 and PMHS(polymethylhydrosiloxane) as backbone in a certain proportion. The chemical structures of both the monomers and polymers thus obtained were confirmed by FT-IR and 1H NMR spectra, and the mesomorphic properties were investigated by DSC, POM, TG and X-ray. Experiment results showed that M1 and M2 are cholesteric and nematic liquid crystal monomers, respectively, and polymer P1 smectic but P2~P8 are chiral smectic A polymers. Furthermore, the glass transition and clearing points of the polymers tend to increase with the increasing content of M1, with a wide range of liquid crystalline phase provided.

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