Prediction of the molecular-weight dependence of mutual diffusion coefficients in polymer-solvent systems
β Scribed by J. S. Vrentas; C. M. Vrentas
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 46 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0021-8995
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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.
## Abstract The anomaly of shear thickening at high shear rates can be observed under certain conditions for high molecular weight polymers dissolved in lowβviscosity Newtonian solvents despite the fact that shearβthinning behavior is considered the norm for these fluids. The nature of the shearβth