Measurement of gas permeability of polymers. II. Apparatus for determination of permeabilities of mixed gases and vapors
Article first published online: 9 MAR 2003
Copyright © 1976 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 20, Issue 2, pages 287–301, February 1976
How to Cite
Pye, D. G., Hoehn, H. H. and Panar, M. (1976), Measurement of gas permeability of polymers. II. Apparatus for determination of permeabilities of mixed gases and vapors. J. Appl. Polym. Sci., 20: 287–301. doi: 10.1002/app.1976.070200201
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 13 JUN 1975
- Manuscript Received: 5 MAY 1975
A gas permeability apparatus has been constructed to facilitate the study of permeation of mixtures of gases and vapors. The apparatus utilizes the carrier gas method with gas-chromatographic analysis to determine individual permeation values and in-line thermal conductivity detectors to provide simultaneous overall diffusion and permeability data. The effects of film type, structure, and morphology on permeability may be studied from atmospheric to 100 psi feed pressure and from ambient to 300°C. Feed stocks may be custom mixed, and a vaporizing bath permits introduction of vapors either as contaminants or as primary permeants in an inert carrier. The experiments which illustrate the use of the equipment suggest that the noninteracting gases H2 and CH4 permeate a number of polymer films independently over a wide concentration range and that water vapor retards their permeation in polyimide films.