高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (2): 362.

• 研究简报 • 上一篇    下一篇

玻璃态PET的有序结构与解偏振光的记忆效应

边界1,2, 叶胜荣1, 吕光烈1, 封麟先1   

  1. 1. 浙江大学高分子科学与工程学系, 杭州 310027;
    2. 杭州师范学院化学系, 杭州 310027
  • 收稿日期:2002-11-12 出版日期:2003-02-24 发布日期:2003-02-24
  • 通讯作者: 边界(1966年出生),男,讲师,博士,主要从事单晶生长和聚合物结晶方面的研究.E-mail:bianjie@163.com E-mail:bianjie@163.com

Memory Effects for Depolarized Light Intensity and the Order in the Glassy PET

BIAN Jie1,2, YE Sheng-Rong1, Lü Guang-Lie1, FENG Lin-Xian1   

  1. 1. Department of Polymer Science and Engineering, Zhejing University, Hangzhou 310027, China;
    2. Department of Chemistry, Hangzhou Teachers College, Hangzhou 310012, China
  • Received:2002-11-12 Online:2003-02-24 Published:2003-02-24

关键词: 聚对苯二甲酸乙二酯(PET), 玻璃态, 有序结构, 解偏振光强度, 记忆效应

Abstract: It was demonstrated that some level of order exists in glassy poly(ethylene terephthalate) by depolarized light intensity(DLI) technique, but this order is different from that in crystalline PET. The degree of order in glassy PET decrease with increasing temperature between 288-343 K. The active energy of this transition is about 22.56 kJ/mol. The IR analysis indicated that this order relates to gauche structure of the ethyleneglycol fragments. The decrease of order with temperature comes from the increase of distance between the order segments.

Key words: Polyethylene terephthalate(PET), Glassy state, Order structure, Depolarized light intensity, Memory effects

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