高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (7): 1028.

• 研究论文 • 上一篇    下一篇

偶氮苯和氧化偶氮苯液晶基元侧链聚硅氧烷液晶的合成和性能研究

罗朝晖, 卓仁禧, 张先亮   

  1. 武汉大学化学系, 武汉 430072
  • 收稿日期:1992-11-27 修回日期:1993-04-01 出版日期:1993-07-24 发布日期:1993-07-24
  • 通讯作者: 卓仁禧
  • 作者简介:第一作者:女, 26岁, 博士研究生.
  • 基金资助:

    国家自然科学基金

Synthesis and Phase Behavior of Liquid Crystalline Polysiloxanes with Azobenzene or Azoxybenzene Mesogens in the Side Chains

LUO Zhao-Hui, ZHUO Ren-Xi, ZHANG Xian-Liang   

  1. Department of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1992-11-27 Revised:1993-04-01 Online:1993-07-24 Published:1993-07-24

摘要: 利用侧链带酰氯基的聚硅氧烷与取代偶氮苯酚进行大分子反应,合成了6种以偶氮苯氧羰基为侧链的聚硅氧烷Ⅲa-f;将其中的Ⅲa-c进行氧化,得到3种以氧化偶氮苯氧羰基为侧链的聚硅氧烷Ⅳa-c聚合物结构通过核磁共振、红外光谱和元素分析表征,利用偏光显微镜和差热分析仪研究了聚合物的相行为.讨论了苯环上取代基和液晶基元的中心桥键对聚合物液晶性能的影响.

关键词: 液晶聚合物, 聚硅氧烷, 偶氮苯液晶基元, 氧化偶氮苯液晶基元

Abstract: In this paper we report nine polysiloxanes with azobenzene or azoxybenzene mesogens in the side chains.Polysiloxanes Ⅲa-f were synthesized by reacting poly (3-chlorocarbonylpropyl)methyl-siloxane-co-dimethylsiloxane with 4-(4'-substituted phenylazo)phenol or 3-methyl-4 (4'-substituted phenylazo)phenol in 74%-81% yields.By the oxidation of Ⅲa-c,polysiloxanes Ⅲa-c were further prepared.The chemical structures of these polysiloxanes obtained were confirmed by IR,1H NMRand elemental analysis.Their phase behavior were investigated using differential scanning calorimeter (DSC) and polarizing microscope.Six of them, Ⅲa-c and Ⅲa-c,show liquid crystalline properties.

Key words: Liquid crystalline polymer, Polysiloxane, Azobenzene mesogen, Azoxybenzene mesogen

TrendMD: