Diffusive fronts of penetrants in glassy polymers
β Scribed by Donald S. Cohen
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 436 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0167-2789
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π SIMILAR VOLUMES
The transport of a solute by diffusion into a glassy polymer can lead to swelling of the material. For certain types of polymers, a sharp interface is formed between the swollen region and the glassy core. When the density of the swollen material is much smaller than the density of the glass, a sign
## Abstract We describe the design and implementation of a method based on infrared monitoring of the OD stretch mode which permits measurement of the diffusion profiles of water permeating glassy polymers for the first time. Results for several glassy polymers are compared with a theory of trappin
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