Abstract: Permeation of pure gases and binary gas mixtures through glassy polymeric membranes have been investigated. The separation factors of Langmuir permeation environment αH and Henry permeation environment αD, were introduced and their relationship with apparent separation tactor α was derived. The effects of feed pressure, composition, temperature and glassy transition of polymer on selective permeability were analysed and the applicabilities of dual-sorption dual-mobility model and its extended formula used for the description of permeation of gas mixtures were also verified experimentally. The phenomena occurring sometimes in practice that "the presence of a slow gas can reduce the permeability of a fast gas, the presence of a fast gas can increase the permeability of a slow gas" and that "the ratio of permeabilities of pure gases is usually larger than the practical apparent separation factor" were discussed with theoretical analysis and experimental data. It was found that these phenomena are not universal and may change conversely un-der specific conditions.

摘要： 本文研究了气体在玻璃态聚合物膜中的渗透行为,提出了Langmuir环境和Henry环境的渗透分离系数的概念,推导出它们与表观分离系数间的关系,分析了压力,组成和温度及膜的玻璃化转变对选择渗透性的影响,验证了双吸着双迁移模型及其扩展形式的适用性.通过理论分析和实验证明探讨了实际中出现的“快气变慢,慢气变快”及“纯气渗透系数之比往往高于实际的混合气渗透分离系数”,指出其并非一般性结论,有时会出现与此相反的结果.