Measurement of gas permeability of polymers. I. Permeabilities in constant volume/variable pressure apparatus
Article first published online: 9 MAR 2003
Copyright © 1976 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 20, Issue 7, pages 1921–1931, July 1976
How to Cite
Pye, D. G., Hoehn, H. H. and Panar, M. (1976), Measurement of gas permeability of polymers. I. Permeabilities in constant volume/variable pressure apparatus. J. Appl. Polym. Sci., 20: 1921–1931. doi: 10.1002/app.1976.070200719
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 8 SEP 1975
- Manuscript Received: 13 DEC 1974
A constant volume/variable pressure gas permeability apparatus is described that provides accurate determination of permeabilities ranging from less than 10−1 to 106 centibarrers. Metal construction, variable temperature control, adjustable downstream pressure and constant volume, and a differential pressure transducer with automatic recording are design features that permit detailed permeability studies under a variety of environmental conditions. Pressure effects on polymer films have been investigated up to 1000 psi, and the relation of gas concentration to permeability has been studied by varying the downstream pressure and volume conditions. The high feed pressures have significantly shortened the time required to obtain meaningful data on low-permeability materials after steady-state conditions are achieved, and the variable-temperature control has permitted evaluation of temperature-related phenomena.