The magnitude of the activation energy for diffusion, ED. is shown to be inversely dependent on the fractional free volume of the polymer above Tg. From the proportionality of ED above and below Tg, the magnitude of El, below T, is also inversely dependent on the free volume in that temperature rang
Effect of the polymer glass transition on the chromatographic retention volumes
β Scribed by J. S. Vrentas; C. M. Vrentas
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 63 KB
- Volume
- 97
- Category
- Article
- ISSN
- 0021-8995
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## Abstract The freeβvolume theory of diffusion is used to predict the effect of the glass transition on the concentration dependence of the solvent selfβdiffusion coefficient at constant temperature. The theoretical prediction is in agreement with experimental data. Β© 2003 Wiley Periodicals, Inc.