Permeability of silicone polymers to hydrogen
Article first published online: 10 MAR 2003
Copyright © 1991 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 42, Issue 9, pages 2397–2403, 5 May 1991
How to Cite
Bhide, B. D. and Stern, S. A. (1991), Permeability of silicone polymers to hydrogen. J. Appl. Polym. Sci., 42: 2397–2403. doi: 10.1002/app.1991.070420904
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 28 AUG 1990
- Manuscript Received: 2 AUG 1990
Permeability coefficients, P̄, for H2 in 10 different types of silicone polymer membranes were measured in the temperature range of 10.0–55.0°C and at pressures up to 100 psig (∼6.8 atm). The values of P̄ decrease slightly with increasing Δp, the pressure difference across the membranes. The permeability of silicone polymers to H2 increases with an increase in temperature; the values of the energy of activation for permeation are in the range of 1.4–4.3 kcal/mol. The substitution of different functional groups in the backbone and side chains of silicone polymers has similar effects on the permeability of the polymers to H2 as observed in earlier studies with other light gases. P̄ for H2 decreases with an increase in the bulkiness of the substituted functional groups. The substitution of SiO bonds with stiffer SiC bonds in the backbone chains also results in a considerable decrease in permeability.