Integral sorption in glassy polymers
β Scribed by J.S. Vrentas; C.M. Vrentas
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 803 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0009-2509
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β¦ Synopsis
A new theory is developed for integral sorption and desorption processes in glassy polymers. The theory can describe both case II diffusion and the classical case of Fickian diffusion. Predictions of the theory are compared with general experimental observations.
π SIMILAR VOLUMES
Anomalous sorption curves have often been observed for differential sorption experiments in glassy polymers. A model is proposed to describe this non-Fickian behavior. This model is based on the presence of interfacial resistance caused by slow rate processes at the phase boundary. Predictions of th
Simple equations are derived that describe integral sorption and desorption experiments under conditions where moving boundary effects in polymer films and spheres can be large because of high solvent concentrations. General conclusions are formulated about the nature of sorption and desorption expe
## Abstract The description of the sorption mechanism of gases in glassy in glassy polymers is of importance for membraneβbased gas separation processes as well as for packaging applications. Dual mode theory, postulating a Henry and Langmuir process to occur and leading to an equation with three a