应用化学 ›› 1993, Vol. 0 ›› Issue (4): 43-46.

• 研究论文 • 上一篇    下一篇

含硝基偶氮苯侧基的丙烯酸酯类液晶聚合物的合成、结构与性质研究—Ⅱ.分子结构对Tg的影响

李敏, 李洪云, 周恩乐, 徐纪平   

  1. 中国科学院长春应用化学研究所高分子物理开放实验室 130022 长春
  • 收稿日期:1992-12-25 修回日期:1993-04-12 出版日期:1993-08-10 发布日期:1993-08-10
  • 基金资助:
    中国科学院重大研究项目;国家自然科学基金资助项目

SYNTHESIS AND STRUCTURAL STUDIES OF SIDE CHAIN LIQUID CRYSTALLINE POLYACRYLATES CONTAINING PARA-NITRO AZOBENZENE—Ⅱ.THE EFFECT OF MOLECULAR STRUCTURE ON Tg

Li Min, Li Hongyun, Zhou Enle, Xu Jiping   

  1. Polymer Physics Laboratory of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1992-12-25 Revised:1993-04-12 Published:1993-08-10 Online:1993-08-10

摘要: 利用DSC研究了分子结构对含硝基偶氮苯侧基的丙烯酸酯液晶聚合物玻璃化温度的影响。结果表明,随柔性间隔基长度增加,Tg降低;当引入丙烯酸甲酯(MA)作为非晶共聚组分时,Tg降低;Tg真随MA摩尔百分含量增加而降低;当引入丙烯酸作为非晶共聚组分时,Tg升高。

关键词: 丙烯酸酯类液晶聚合物, 共聚物, 玻璃化温度

Abstract: The glass-transition temperatures of the side chain liquid crystalline polyacrylates containing para-nitro azobenzene have been studied by DSC. It was found that the Tg value decreased with increasing the length of the spacer and MA content in the copolymers. But for the copolymers containing acrylic acid the Tg is higher than that of the corresponding homopolymers owing to the presence of hydrogen bond.

Key words: polyacrylate liquid crystalline, copolymer, glass transition temperature