A structural rheological model for describing shear thickening in structured systems, namely, in concentrated suspensions, micellar solutions, and in solutions of associated polymers has been proposed. The cause of shear thickening is the appearance of a structure under the action of shear due to collision of particles or macromolecules. This increases the strength of adhesion between particles or macromolecules. An integral characteristic of the structure is the total number of aggregated particles. The kinetic equation describing the process of formation/destruction of aggregates during the shear thickening contains four rate constants and leads to the rheological equation with two coefficients. The approximation by the equations of the structural rheological model for associated polymer solution and for suspension of particles, between which hydrogen bonds can form, is performed.
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