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Segmental mobility model for diffusion of gases in polymers

✍ Scribed by L. G. F. Stuk

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
268 KB
Volume
28
Category
Article
ISSN
0887-6266

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✦ Synopsis

Abstract

Diffusion of small molecules in polymers is described quantitatively in terms of segmental mobility processes. The diffusion coefficient depends on a diffusive jump length, which is characteristic of the polymer, and a jump frequency, which is equated to the segmental mobility rate. The presence of a particular solute increases mobility of the surrounding polymer segments by a predictable amount, which is related to the partial molar volume of the solute. The theory is fit to experimental diffusion data, and partial molar volumes are calculated from the fitting parameters. Good agreement with experimental partial molar volumes is obtained.

πŸ“œ SIMILAR VOLUMES

Diffusion of gases and vapors through po
Diffusion of gases and vapors through polyvinyl chloride–polyvinyl acetate copolymer films II. The effect of polymer segment mobility
✍ Kumins, C. A. ;Roteman, J. πŸ“‚ Article πŸ“… 1961 πŸ› John Wiley and Sons βš– 472 KB

## Abstract The minimum free volumes involved in the diffusion of gases of various sizes through a copolymer of polyvinyl chloride–polyvinyl acetate have been calculated by use of equations developed by F. Bueche. It was found that as the gas diameter of the diffusant increased, the minimum free vo