中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (5): 82-85.

• 研究简报 • 上一篇    下一篇

不同软段聚氨酯的透气性研究

张中权, 谢静薇, 季广华, 张胜   

  1. 复旦大学材料科学系 上海
  • 收稿日期:1987-09-02 修回日期:1988-02-08 出版日期:1988-10-10 发布日期:1988-10-10

STUDY ON GAS PERMEABILITY OF POLYURETHANE WITH DIFFERENT SOFT SEGMENTS

Zhang Zhongquan, Xie Jingwei, Ji Guanghua, Zhang Sheng   

  1. Department of Material Science, Fudan University, Shanghai
  • Received:1987-09-02 Revised:1988-02-08 Published:1988-10-10 Online:1988-10-10

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385

摘要： 热塑性聚氨酯弹性体是一种包含有软、硕段的多嵌段聚合物,有关其结构与性质的研究已有很多报道[1,2],但对它的透气性质研究尚少.McBride[3]和 Knight[4]等曾对不同硬段含量、不同扩链剂的聚氨酯透气性质作过研究.本工作着重研究不同软段结构和软段长度对聚氨酯透气性的影响,以及含混合软段的聚氨酯的透气性.

关键词: 聚氯酯薄膜, 透气性, 软段

Abstract: The permeability coefficient(Pg)of polyurethane(PU)with polybutylene adipate(PBA) or polypropylene glycol(PPG)as soft segment has been investigated.Both the types and length of the soft segment have great effect upon the gas permeability.PU with PPG segment shows higher gas permeability than that with PBA segment,Increasing the soft segment length brings about an increase in gas permeability and a decrease in the apparent activation energy. The linear relationship between Pg and the composition of the mixed soft segments indicates that the permeability coefficients of PU with PBA and PPG as soft segment are additive.

Key words: Polyurethane membrane, Gas permeability, Soft segment

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