Abstract
A semi-empirical theory for steady-state viscosity η0 and compliance Je of a binary blend of homologous monodisperse polymers is formulated by using the expressions for selfdiffusion coefficients derived in Part I and postulating some assumptions for the factors related to the coupling of different polymer chains. It is shown that the expression derived for η0 can brought to a close numerical agreement with the empirical viscosity law η0∝Mw3.4, where Mw is the weightaverage molecular weight of the polymers making up the blend, if a single function of x, the ratio of the molecular weights of the constituent polymers, is suitably chosen. It is also shown that the derived expression for Je predicts fairly correctly some typical experimental data on polystyrene blends.
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Fujita, H., Einaga, Y. Self Diffusion and Viscoelasticity in Entangled Systems II. Steady-State Viscosity and Compliance of Binary Blends. Polym J 17, 1189–1195 (1985). https://doi.org/10.1295/polymj.17.1189
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DOI: https://doi.org/10.1295/polymj.17.1189
