KINETICS OF FORMATION OF SEMIINTERPENETRATING POLYMER NETWORKS IN THEPRESENCE OF FILLER

Kinetic laws of formation of semiiterpenetrating polymer networks base d on cross linked poly urethane (PU) (reaction of polyaddition) and li near poly(butyl methacrylate) (PBMA) (radical polymerization) in the p resence of inorganic (talc) and polymeric (the product of triethylene glycol dimethacrylate polymerization) fillers were studied. It is show n that at low degrees of filling (up to 20 wt %) both fillers increase the PBMA formation rate as compared to the initial value,while the PU formation rate decreases. With increasing filler concentration, the f ormation rates of both PBMA and PU networks decrease. The established laws of the concentrational effects produced by the filler, the cataly st of urethane formation; and the initiator of radical polymerization allow one to control the formation rate of semiinterpenetrating polyme r networks and microphase composition of the composite material.