高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (9): 1712.

• 论文 • 上一篇    下一篇

PET/HBA/TA/HQ四元共聚酯形态及相结构的研究

兰强, 程丹, 于瀛, 卜海山   

  1. 复旦大学材料科学系, 上海 200433
  • 收稿日期:2002-07-16 出版日期:2003-09-24 发布日期:2003-09-24
  • 通讯作者: 卜海山(1937年出生),男,教授,博士生导师,从事商分子结晶、结构与形态研究.E-mail:hsbo@arcep.stc.sh.cn E-mail:hsbo@arcep.stc.sh.cn
  • 基金资助:

    国家自然科学基金(批准号:29774004)

Morphology and Phase Behavior of the PET/HBA/HQ/TA Copolyesters

LAN Qiang, CHENG Dan, YU Ying, BU Hai-Shan   

  1. Department of Materials Science, Fudan University, Shanghai 200433, China
  • Received:2002-07-16 Online:2003-09-24 Published:2003-09-24

摘要: 研制了一套蚀刻方法并对聚对苯二甲酸乙二醇酯/对羟基苯甲酸/对苯二甲酸/对苯二酚(PET/HBA/TA/HQ)体系的共聚酯液晶试样断面进行蚀刻,并用扫描电镜观察,发现此类共聚酯中存在两相结构.当PET摩尔分数小于50%时,分散相呈球状且富含PET,连续相富含全芳族链段;当PET摩尔分数等于或大于50%时,分散相和连续相结构发生颠倒,连续相富含PET,分散相球状粒子富含全芳族链段且为纤维状结构.因此可以断言,用熔融缩聚方法制备的PET/HBA/TA/HQ四元共聚酯不是无规共聚物,而是嵌段共聚物.

关键词: 共聚酯液晶, 蚀刻, 两相结构, 形态

Abstract: Aseries of etching methods were developed for the morphology observation of liquid crystalline copolyester. Phase behavior of the PET/HBA/HQ/TA copolyester was investigated by SEM after etching. Atwo-phase structure of these copolyesters was found. When PETmolar fraction is lower than50%, HBA/HQ/TA-rich-phase is a continuous phase, while the dispersion particles are PET-rich-phase. When PET molar fraction is equal to or greater than 50%, PET-rich-phase constitutes continuous phase, while HBA/HQ/TA-rich-phase forms dispersion particles which are composed of fibers. Therefore this PET/HBA/HQ/TA copolyester is not a random copolymer but a block one with long PET blocks.

Key words: Liquid crystalline copolyester, Etching, Two-phase structure, Morphology

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