Abstract
On the assumption that pseudoplastic flow is associated with the formation and rupture of structural linkages a new flow equation is derived. The equation takes the form ƞ = ƞ ∞ + ƞ 0 − ƞ ∞ 1 + αD 2 3 , where D = rate of shear, η 0 = limiting viscosity at zero rate of shear, η ∞ = limiting viscosity at infinite rate of shear, and α is a constant associated with the rupture of linkages. Graphical methods for evaluating the three constants η 0 , η ∞ , and α are presented. Experimental data are presented on a wide range of pseudoplastic systems, ranging from suspensions to optically clear solutions, in both aqueous and nonaqueous media. In all cases the results conform to the equation with a high degree of accuracy over a wide range of shear rates.
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