TIME LAG FOR DIFFUSION OF GAS MIXTURES

被引:13
作者
ALEXOPOULOS, JB
BARRIE, JA
MACHIN, D
机构
[1] Physical Chemistry Laboratories, Imperial College of Science and Technology, London
关键词
D O I
10.1016/0032-3861(69)90038-X
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The diffusion of a gas mixture of several components through a polymer membrane is considered. An expression is obtained for the time lag L assuming that the component flows are non-interacting and that the component diffusion and solubility coefficients are not functions of concentration. Measurements were made with a krypton-neon mixture and a silicone rubber membrane and good agreement obtained with the theoretical expressions. To establish the steady state of flow in a single component system requires a time of ∼3L. For mixture diffusion it is shown that this criterion is not usually valid. © 1969.
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页码:265 / +
页数:1
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