Prediction of mutual diffusion coefficients for acrylic polymer+organic solvent systems using free volume theory
β Scribed by Shigetoshi Kobuchi; Yasuhiko Arai
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 65 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0079-6700
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π SIMILAR VOLUMES
Several versions of free-volume theory have been proposed to correlate or predict the solvent diffusion coefficient of a polymer/solvent system. The quantity of free volume is usually determined by the Williams-Landel-Ferry (WLF) equation from viscosity data of the pure component in these theories.
The effect of solvent size on the diffusion process is studied for various solvents with natural rubber and polybutadiene in terms of the free-volume theory. The importance of energy effects on the diffusion of penetrants in rubbers is examined. The critical molar volume of the polymer jumping unit