Abstract
AbstractSolution viscosity is known to be sensitive to the nature of solvent and the polymer concentration. The magnitude of such effects, however, is not quantitatively understood. Correlations to predict zero‐shear and shear‐rate dependent viscosity of polymer solutions from polymer solution parameters are presented. Polymer domain volume is found to be the controlling parameter for the zero‐shear viscosity of dilute polymer solutions, that is solutions with insignificant entanglements. At higher concentrations, where polymer‐polymer interactions become significant, it is found that, except for the magnitude of the solvent viscosity, the nature of the solvent is of no consequence. In this region zero‐shear viscosity is correlated as a function of the parameter cM5/8, where C and M represent concentration and molecular weight, respectively. A relaxation time such as Bueche's time constant satisfactorily represents the solvent effects on the non‐Newtonian behavior of polymer solutions by incorporating the measured zero‐shear and solvent viscosities.
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