Kinetic and chemorheological modeling of the vitrification effect of highly reactive poly(urethane-isocyanurate) thermosets.

Highlights: [•] The kinetics of a poly(urethane-isocyanurate) were modeled with an autocatalytic approach. [•] The relationship between the transition temperatures and conversion of the urethane and isocyanurate networks was measured with DSC analysis. [•] The urethane network was found to interact with the isocyanurate network through the vitrification effect. [•] A chemorheological model which contemplated the viscosity contribution of each network was proposed. [•] The chemorheological model was able to predict the experimental data and it was used to predict the behavior at elevated temperatures, where the rheometer was unable to measure the viscosity variation as a function of time. [Copyright &y& Elsevier]