引用本文:
张中权, 谢静薇, 季广华, 张胜. 不同软段聚氨酯的透气性研究[J]. 应用化学,
1988, 5(5): 82-85.
Citation: Zhang Zhongquan, Xie Jingwei, Ji Guanghua, Zhang Sheng. STUDY ON GAS PERMEABILITY OF POLYURETHANE WITH DIFFERENT SOFT SEGMENTS[J]. Chinese Journal of Applied Chemistry, 1988, 5(5): 82-85.
Citation: Zhang Zhongquan, Xie Jingwei, Ji Guanghua, Zhang Sheng. STUDY ON GAS PERMEABILITY OF POLYURETHANE WITH DIFFERENT SOFT SEGMENTS[J]. Chinese Journal of Applied Chemistry, 1988, 5(5): 82-85.
不同软段聚氨酯的透气性研究
English
STUDY ON GAS PERMEABILITY OF POLYURETHANE WITH DIFFERENT SOFT SEGMENTS
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 seg-ment shows higher gas permeability than that with PBA segment,Increasing the soft seg-ment 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.
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Key words:
- Polyurethane membrane
- / Gas permeability
- / Soft segment
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