▎ 摘　　要

The kinetics of catalyzed by dibutyltin dilaurate reaction of polyurethane (PU) synthesis was studied in dependence of amount of aromatic amine (cuamine A) chain extender and amount of nanosized filler (graphene). It was found that the reaction is zero order. The addition of graphene in the reaction system did not change this kinetics. Our data show that the reaction rate decreases with increasing amount of chain extender and graphene. The mechanical performance of PU increases with the increase of hard segment contains and values of the degree of the phase separation. The value of the degree of the phase separation is dominated factor influenced on mechanical properties. The introduction of graphene blocks the PU phase separation and, therefore, leads to fall in mechanical properties. The kinetics of the hard domain growth of the PU matrix was studied and successfully described using the two-parameter Avrami model for isothermal crystallization. The growth of polymers induces a thermal primary nucleation for hard domain growth. It is shown that nanosized graphene does not change the nucleation mechanism.