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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. shu

STUDY ON GAS PERMEABILITY OF POLYURETHANE WITH DIFFERENT SOFT SEGMENTS

1.
Department of Material Science, Fudan University, Shanghai

Received Date: 2 September 1987
Available Online: 8 February 1988

The permeability coefficient(P_g) 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 P_g and the composition of the mixed soft segments indicates that the permeability coefficients of PU with PBA and PPG as soft segment are additive.
- Polyurethane membrane,
- Gas permeability,
- Soft segment
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