Permeation of several gases through elastomers, with emphasis on the deuterium/hydrogen pair
✍ Scribed by M. W. Fitch; W. J. Koros; R. L. Nolen; J. R. Carnes
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 903 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
✦ Synopsis
The diffusion and permeation coefficients for He, Hz, D2, 0 2 , and Nz in a variety of elastomers were measured by simple manometric methods. The elastomers studied were butyl rubber; HypalonO 40 and 45; VitonO E60 and GF; HydrinO 100 and filled HydrinO 100; Kraton@ G, FG, and KG VTEOS; EPDM; epoxidized natural rubber; and neoprene. Consistent with earlier studies, elastomers with higher glass transition temperatures exhibited lower diffusion coefficients. The ratio of diffusion coefficients of the hydrogen isotope pair differed from the purely molecular-weight-based prediction. Deuterium's slightly smaller size relative to hydrogen is consistent with observed deviations from the molecular-weightbased diffusion coefficient ratio.