Kinetics of formation of interpenetrating polymer networks based on poly(urethane) and polystyrene

The kinetics of the simultaneous formation of constituents of interpenetrating polymer networks and semiinterpenetrating polymer networks based on a network PU and linear and crosslinked polystyrenes were studied under variable kinetic parameters: the concentrations of the initiator, catalyst, and crosslinking agent (for polystyrene) and the ratio of components. It was shown that the simultaneous formations of two polymers following two mechanisms (polyaddition and free-radical polymerization) are interrelated to such an extent that a variation in the kinetic parameters influences both the urethane-formation reaction and the polymerization of styrene and affects the features of phase separation.