高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (11): 1694.

• 论文 • 上一篇    下一篇

PEEK链分子内γ-松弛过程构象机理的研究

沈良骏1, 叶世勇1, 李前树2   

  1. 1. 安徽师范大学化学系, 芜溯, 241000;
    2. 北京理工大学化工与材料学院, 北京, 100081
  • 收稿日期:1994-03-21 修回日期:1994-08-10 出版日期:1994-11-24 发布日期:1994-11-24
  • 通讯作者: 沈良骏,男,52岁,硕士,副教授.
  • 作者简介:沈良骏,男,52岁,硕士,副教授.
  • 基金资助:

    国家自然科学基金

The Study of Conformational Mechanism of γ-Relaxation in PEEK Chain Molecules

SHEN Liang-Jun1, YE Shi-Yong1, LI Qian-Shu2   

  1. 1. Department of Chemistry, Anhui Normal University, Wuhu, 241000
    2. College of Chemical Engineering and Material Science, Beijing Institute of Technology
  • Received:1994-03-21 Revised:1994-08-10 Online:1994-11-24 Published:1994-11-24

摘要: 使用AM1半经验量化计算,研究在PEEK链分子内γ-松弛的构象机理。指出部分链段作曲柄式运动时,各相连苯环不断调节其相对位置。γ-松弛的活化能与苯环间相对转动势垒、链骨架绕骨架平面作曲柄式运动势垒及链间相互作用有关,本文估算各部分的大小,并对苯环在PEEK链内相对取向作进一步的计算,得到十分接近实验数据的结果。

关键词: PEEK, &gamma, -松弛, AM1, 构象能

Abstract: In this paper AMl semiempirical quantum mechanics calculation was used to study the conformational mechanism of γ-relaxation in PEEKchain molecules.The results show that the contacted phenyl rings will adjust the relative positions when the chain segments are doing crankshaft type motion, and the activation energy of γ-relaxation is interrelated to the relative rotation barrier of phenyl rings, the barriers of crackshaft motions of chain segments and the intermolecular interactions of chains.The value of each part was estimated in this paper and the further calculation of the relative orientation of phenyl rings in PEEKwas done, a much, better result compared with the experimental data was achieved.

Key words: PEEK, γ-relaxation, AMl, Comformational energy

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