Quantitative analysis of gaseous diffusion in glassy polymers
β Scribed by Petropoulos, J. H.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1970
- Tongue
- English
- Weight
- 306 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0449-2978
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β¦ Synopsis
Abstract
The current theoretical treatment of diffusion of gases in glassy polymers is based on the βdual sorptionβ model, but also includes certain other important assumptions, at least some of which cannot be fully justified a priori. They require experimental validation, which, however, is not possible by the procedures used or proposed so far. Methods suitable for this purpose are discussed here.
π SIMILAR VOLUMES
In this article, a mathematical model is proposed for predicting solvent self-diffusion coefficients in amorphous glassy polymers based on free volume theory. The basis of this new model involves consideration of the plasticization effects induced by small molecular solvents to correctly estimate th
Small molecules in glassy polymers are considered to occupy sites with a distribution of free energies of dissolution. Then their diffusivity depends on concentration and temperature in the same way as it has been derived for hydrogen atoms in metallic glasses. For hydrogen it was shown that the tra