Viscosity-temperature relationships for poly(vinyl chloride)-tetrahydrofuran dilute solutions
β Scribed by N. Aelenei; I.A. Schneider
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 251 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0014-3057
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π SIMILAR VOLUMES
Absolute viscosities of dilute solutions of poly(vinyl chloride) (PVC) in cyclohexanone and in its blends with xylene were determined at temperatures ranging from 5 to 50ΠC and in THF at 5-30ΠC. The simple Arrhenius reaction kinetics equation, used by Anrade to analyze the viscosity data of liquids
Values of Q and A in the expression ~ = A exp (Q/RT)have been obtained for dilute solutions of fractions of a Bisphenol A polyearbonate in five solvents. The apparent activation energy of viscous flow Q varies with concentration c and molecular weight M according to where Q0 refers to the solvent a
## Viscosity-Temperature Relationships for Dilute Solutions of Poly(cyclohexy1 Methacrylate) in Methyl Isobu tyl Ketone Usually, the temperature dependence of the absolute viscosity q can be written as where RTis the thermal energy and Q is the apparent activation energy of viscous flow which is c