高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (8): 1240.

• 论文 • 上一篇    下一篇

光致变色液晶高分子研究(Ⅲ)─含胆甾介晶基元和偶氮苯光色基元侧链共聚硅氧烷的液晶行为

张其震1, 王艳2, 侯建安3, 徐懋3   

  1. 1. 山东大学化学系, 济南, 250100;
    2. 山东大学环境科学中心, 济南, 250100;
    3. 中国科学院化学研究所, 北京, 100080
  • 收稿日期:1993-10-21 修回日期:1994-02-23 出版日期:1994-08-24 发布日期:1994-08-24
  • 通讯作者: 张其霞,男,56岁,副教授.
  • 作者简介:张其霞,男,56岁,副教授.
  • 基金资助:

    国家自然科学基金;中国科学院高分子物理联合开放实验室(化学所)科学基金

Studies on Photochromic Liquid Crystalline Polymers (Ⅲ)─Liquid Crystalline Behavior of Side-Chain Copolysiloxanes Containing Cholesteric Mesogens and Azobenzene Photochromic Groups

ZNANG Qi-Zhen1, WANG Yan2, HOU Jian-An3, XU Mao3   

  1. 1. Department of Chemistry, Shandong University, Jinan, 250100;
    2. Centre of Environmental Science, Shandong University, Jinan, 250100;
    3. Institute of Chemistry, Academia Sinica, Beijing, 100080
  • Received:1993-10-21 Revised:1994-02-23 Online:1994-08-24 Published:1994-08-24

PDF (PC)

摘要： 用热台偏光显微镜、X射线衍射和DSC研究了含胆甾介晶基元和偶氮苯光色基元侧链共聚硅氧烷(PSI)的液晶性。将非介晶基元并入液晶均聚物,所得共聚物的液晶态类型不变,仍显示近晶型织构,在PSI共聚物中,保持液晶性的含介晶基元单体的最低极限组成为60mol%.在液晶性存在的范围内,共聚物的清亮点由130℃升至170℃,液晶共聚物的热稳定性随非介晶组分含量的增加而增强。

关键词: 热致性液晶高分子, 侧链共聚硅氧烷, 近晶相, 胆甾基元

Abstract: The liquid crystalline properties of side-chain copolysiloxanes containing cholesteric mesogens and azobenzene photochromic groups were characterized by polarized microscopy with a hot stage (POM), DSCand WAXD. On incorporation of nonmesogenic units into LCpolysiloxane the type of mesophase is not changed and smectic texture is preserved for copolysiloxanes PSI-2-8. Composition limit for mesophase existence of copolysiloxanes of mesogenic monomers with monomers, that do not contain mesogenic fragments, is to be 60 mol%. In the composition region of mesophase existence the clearing temperature of copolysiloxanes varies from 130℃ into 170℃ and mesophase thermostability is increased by the increasing nonmesogenic component content of copolysiloxanes.

Key words: Thermotropoc liquid crystalline polymer, Side-chain copolysiloxane, Smectic phase, Cholesteric mesogens

TrendMD: