Damping and mechanical properties of polyol cross-linked polyurethane/epoxy interpenetrating polymer networks

Abstract

A series of glycerol cross-linked polyurethane (g-PU)/epoxy (EP) interpenetrating polymer networks (IPNs) were prepared by sequential method. The functional group change, mechanical properties, morphology, thermal stability, and damping properties were studied. Thermogravimetric analysis result reveals that the thermal stability of these IPNs is enhanced with the increase in the content of g-PU. The result of dynamic mechanical analysis shows that the effective damping temperature range is broadened and (tan δ)_max is increased through the introduction of g-PU into EP to form IPNs. Mechanical measurement indicates that the tensile and impact strength of these IPNs reaches the maximum value at the g-PU content of 10%.