高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (5): 844.

• 研究论文 • 上一篇    下一篇

热塑性聚氨酯弹性体中的氢键作用──动态力学分析

陈大俊, 李瑶君   

  1. 中国纺织大学纤维材料改性国家重点实验室, 上海 200051
  • 收稿日期:2000-04-30 出版日期:2001-05-24 发布日期:2001-05-24
  • 通讯作者: 陈大俊(1957年出生),男,教授,主要从事合成、天然高分子材料的改性和加工及功能高分子材料等研究.
  • 基金资助:

    上海市教委重点学科建设项目(批准号:B980702)资助

Hydrogen Bonding in Thermoplastic Polyurethane Elastomers── Dynamic Mechanical Analysis

CHEN Da-Jun, LI Yao-Jun   

  1. State Key Laboratory of Fiber Materials Modification, China Textile University, Shanghai 200051, China
  • Received:2000-04-30 Online:2001-05-24 Published:2001-05-24

摘要: 采用动态力学分析方法研究了一系列由聚四氢呋喃(Mn=2000)、4,4-二苯基甲烷二异氰酸酯以及N-甲基二乙醇胺、1,4-丁二醇和1,2-丙二胺三种不同的扩链剂合成的TPU中的氢键作用.发现这种氢键作用符合Arrhenius型的温度依赖性.从弹性模量-温度关系曲线上估算出氢键解离活化能和物理交联密度

关键词: 热塑性聚氨酯弹性体, 氢键作用, 物理交联, 温度依赖性

Abstract: Arelatively high degree of physical crosslink was inferred from the superior mechanical properties of thermoplastic polyurethane elastomers(TPU). For the most part, this has been assumed due to hydrogen bonding. In this paper hydrogen bonding effects in some thermoplastic polyurethane elastomers, consisting of poly(tetramethylene oxide) of Mn=2000, 4,4'-diphenyl methane diisocyanate and extenders: N-methyl diethanol amine,1,4-butandiol and 1,2-ethylene diamine, have been studied by using dynamic mechanical analysis. The activation energies of hydrogen bonding dissociation and the physical crosslink densities have been evaluated from the elastic modulus temperature relation of the TPUsamples.

Key words: Thermoplastic polyurethane elastomers, Hydrogen bonding, Physical crosslink, Temperature dependence

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