The zero-shew viscosity r)o of five epoxy resins were analyzed on the basis of the free volume concept. The experimental data, spanning at least six decades in viscosity, were linearized by means of a viscosity-temperaturerelation~ = q,,(T),derivedbyUtracki a few years earlier. The linearization ena
Scaling analysis of the temperature dependence of intrinsic viscosity
β Scribed by Ralph H. Colby
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 106 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0887-6266
No coin nor oath required. For personal study only.
β¦ Synopsis
The scaling predictions for the temperature dependence of the intrinsic viscosity of flexible polymers are briefly reviewed. When the predictions are fit to a power law over a fixed range of chain length, a relation between the exponent and prefactor of the Mark-Houwink-Sakurada equation emerges. In comparing with the experimental data compilation of Rai and Rosen, we conclude that real polymer systems are nowhere near the true good solvent limit, even when the exponent matches the good solvent prediction.
π SIMILAR VOLUMES
Some 25 years ago, and Haug O. & Haug, A., SmidsrΓd (SmidsrΓd, Biopolymers, 10 (1971) 1213) constructed an empirical method, the "B-valueΓ method to evaluate the charge e β ect for Γexible and semi-Γexible polyelectrolytes. More recently Odijk (Odijk, T., J. Polym. Sci. : Polym. Phys. Ed., 15 (1977)