中华医学超声杂志

应用化学 ›› 1989, Vol. 0 ›› Issue (5): 47-50.

• 研究简报 • 上一篇    下一篇

聚氨酯弹性体相分离程度的研究

宋名实1, 沈一丁2, 任志勇2   

  1. 1. 北京化工学院高分子材料研究所;
    2. 中国科技大学应用化学系 合肥
  • 收稿日期:1988-10-15 修回日期:1989-03-17 出版日期:1989-10-10 发布日期:1989-10-10
  • 基金资助:
    国家自然科学基金

ON THE DEGREE OF PHASE SEPARATION OF TPUE

Song Mingshi1, Shen Yiding2, Reng Zhiyun2   

  1. 1. Research Institute of Polymeric Materials, Beijing Institute of Chemical Technology;
    2. Department of Applied Chemistry, University of Science and Technology of China, Hefei
  • Received:1988-10-15 Revised:1989-03-17 Published:1989-10-10 Online:1989-10-10

PDF

391

被引次数

10 | 2

摘要： 热塑型聚氨酯弹性体(TPUE)的动态力学性能和热性能研究已有许多报导,但多集中于弹性体的链结构及其组成等方面,本文则侧重于研究聚醚氨酯(ET)和聚酯氨酯的相分离过程及其程度,考察硬段含量(Wh)和软段分子量(Mn·3等因素对微相结构的影响。

关键词: 聚氨酯弹性体, 相分离, 动态力学分析, 差示扫描量热法

Abstract: The degree of phase separation of thermoplastic polyurethane elastomers (TPUE) hasbeen studied by means of DMA and DSC measurements. The influence of hard segmentcontent, molecular peight of soft segment on the degree of phase separetion of TPUE andthe dependence of |△E′/△T|,△αs,1/2in the αs,1/2 transition range on Wh have also beeninvestigeted.Tt is found that there exist a lincar relation between |△E′/△T|,△αs,1/2,1/tanδ,△Cp2/△Cp1 and Wh.

Key words: Polyurethane elastomer, Phase separation, Dynamic mechanical analysis, Differential scanning calorimetry

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