Recent Progresses in ESR Studies on Catalysts for Olefin Polymerization

Many polymerization catalysts have different transition-metal centers.In situ ESR can be used to monitor these transition metal centers having one or more unpaired electrons.Thus the reaction route and mechanisms of polymerization can be investigated by in situ ESR.In this paper,recent research progresses in ESR studies on catalysts for olefin polymerization are reviewed,including common olefin polymerization catalysts based on Ti,Ni,V and Cr.