应用化学 ›› 1988, Vol. 0 ›› Issue (6): 57-60.

• 研究简报 • 上一篇    下一篇

聚甲基丙烯酸胆甾醇酯共聚物的合成、结构与性能研究 Ⅳ.PMACE的相态转变及光学性质

周恩乐, 赵晓光, 张永清   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1987-11-23 修回日期:1988-05-31 出版日期:1988-12-10 发布日期:1988-12-10
  • 基金资助:
    国家自然科学基金

SYNTHESIS, STRUCTURE AND PROPERTIES OF COPOLYMER OF CHOLESTERIC ESTER Ⅳ. THE PHASE TRANSITION AND OPTICAL PROPERTIES OF PMACE

Zhou Enle, Zhao Xiaoguang, Zhang Yongqing   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1987-11-23 Revised:1988-05-31 Published:1988-12-10 Online:1988-12-10

摘要: Finkelmann[1]和Шибаев[1]等人对侧链胆甾型高分子液晶的研究表明,将具有液晶功能的低分子基团,经过一个软段连接到柔性高分子主链上的梳型高分子在一定的温度下可以形成液晶态,调节侧链高分子液晶的分子结构、软段长度,可以改变其相态转变温度及微区形态。前已报导具有不同侧链结构的聚甲基丙烯酸胆甾醇酯共聚物的合成、相态转变及光学性质,本文通过对聚甲基丙烯酸胆甾醇乙烯酯共聚物(PMACE)的液晶态及结晶态的微细结构及相态转变与胆甾侧链含量关系的研究,给出了液晶态的形成条件及结构特征。

关键词: 胆甾酯, 高分子液晶, 相转变, 光学性质

Abstract: The phase transition and optical properties of copolyfilets of cholesteric ester of hydroxyethyl methylmethacrylate(PMACE) were studied by DSC, optical microscopy,scanning electron microscopy and X-ray diffraction. An isotropic-mesophase transition and a mesophase-crystal transition were tound in the cooling DSC curve of PMACE. The temperature of transitions increases with dicrease of the content of cholesteric side chain units. Under certain conditions PMACE was found to be turned into liquid crystalline state as observed by crossed polarizers of polarizing microscope and SEM. Solution of PMACE in CHCl3 is optical anisotropic. Its specific rotation value depends on the ratio of methylmethacrylate to cholesteryl group.

Key words: Cholesteric ester, Liquid crystal of polymer, Phase transition, Optical property