Polymerization of propylene to syndiotactic polymer. Part. I: Valence of active vanadium in the catalytic systems

Abstract

Abstract Homogeneous catalytic systems for the polymerization of propylene both to syndiotactic and amorphous polymers, based on soluble vanadium compounds and organometallic compounds of aluminium, were investigated by EPR analysis at different temperatures. It was shown that the vanadium in the catalytic complex has a valence state of 3.