The paper presents the results of studying the effects of butadiene-nitrile rubber concentration and temperature on the flow curves of the random polypropylene-based polymer blends. To improve the technological compatibility of polymer blends, a graft(ed) copolymer of polypropylene with maleic anhydride was used as a compatibilizer. Melt viscosity as a function of temperature and shear rate is shown, and the activation energy of a viscous flow has been defined. A generalized temperature-invariant characteristic of the viscosity properties of polymer blends has been plotted. This makes it possible to predict the value of their effective viscosity at high shear rates, close to real processing conditions

doi.org/10.32737/0005-2531-2021-1-23-29