Multi-Structural Thixotropic Model

Influence of sodium polyacrylate on the rheology of aqueous Laponite dispersions

“…This fitting is done by considering that the lineal variation of shear rate is a succession of step-changes, where each shear rate is kept constant for a small increment of time, t, and the initial viscosity of each increment does not change with shear rate. The latter consideration is not valid for dispersions that show shear-thinning behavior, when the viscosity changes with step changes of shear rate [33,34]. When the shear rate increases, the internal unions between Laponite particles can be stretched, giving a viscosity lower than the previous one, and further broken down.…”