Factorization of the activation energies of permeation and diffusion of gases in polymers
โ Scribed by Frisch, H. L.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1963
- Tongue
- English
- Weight
- 201 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0449-2986
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
It is well established that diffusion and relaxation processes in polymers above T, are closely related in that they are both governed by the polymer segmental motions, which are believed to be determined by the free volume present in the system. The diffusion coefficients of gases in elastomers can
Steady-state permeation rates for pure COz and CH4 and the binary mixture through homogeneous dense polysulfone and polycarbonate membranes have been measured at 40ยฐC and upstream pressures up to 26 atm. The pressure dependence of the mean permeability coefficients for COz and CH, for all of the sys
Molecular dynamics simulations are performed to study the diffusion and permeation of gases, including argon, nitrogen, methane, carbon dioxide, and propane, in polystyrene over a wide range of temperatures. A jumping mechanism is observed for the diffusion of diffusants in polymer. The calculated d