高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (2): 218-220.

• 研究简报 • 上一篇    下一篇

热致性共聚酯液晶的研究--以双酚-对苯二甲酸酯为间隔段

张鸿志, 管志斌   

  1. 北京大学化学系
  • 收稿日期:1987-07-13 出版日期:1989-02-24 发布日期:1989-02-24
  • 通讯作者: 张鸿志
  • 基金资助:

    国家科学基金

Studies on Thermotropic Liquid Crystalline Copolyesters--Terephthalates of Bisphenols as Rigid Spacers

Zhang Hongzhi, Guan Zhibin   

  1. Department of Chemistry, Peking University, Beijing
  • Received:1987-07-13 Online:1989-02-24 Published:1989-02-24

摘要: 热致性共聚酯液晶由于具有优异的热、机械及加工等性能,引起人们对其应用及基础研究的重视。本实验室曾对以不同长度碳链为软间隔段的共聚酯进行了研究,在产物介晶单元含量不高(约20%)时即可表现出明显液晶性。本文选用以双酚A(BPA)或双酚S(BPS)-对苯二甲酸酯为间隔段进行了研究。

关键词: 共酯聚液晶, 双酚-A-对苯二甲酸酯间隔段, 玻璃化温度

Abstract: Two series of copolyesters based on p-acetoxybenzoic acid (Ac-HBA), terephthalic acid(TA) and bisphenol Adiacetate(Ac-BPA) or bisphenol Sdiacetate (Ac-BPS) were prepared by melt polycondensation technique. The copolyesters in a certain extent of compositions were thermotropic with wide liquid crystalline temperature ranges. The minimum amount of mesogenic units derived from Ac-HBAin feed necessary for the appearance of mesomorphic phase is about 10 % mol. Tgs of BPA series copolyesters were essentially constant and close to that of polymer of rigid spacer regardless of compositions. But the Tfs showed a minmum value towards the compositions.

Key words: Liquid crystalline copolyesters, Terephthalate of bisphenols as rigid Spacer, Glass transition Temperature