Abstract

AbstractA model is developed to calculate the influence of the shear rate on the intrinsic viscosity of dilute solutions of nondraining polymer coils. The polymer molecule is substituted by an equivalent ellipsoid with internal flow currents such that the macromolecule yields to the liquid flow and follows it up to a certain extent. The dimensions of the ellipsoid are obtained by equating the hydrodynamic deforming forces to the statistical restoring forces of the polymer chain. The intrinsic viscosity of the solution can then be calculated as a function of the shear rate.

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