Features of the Effect of Organochlorine Compounds on Polymerization of Olefins and Dienes in the Presence of Ziegler-Natta Catalysts

The publications of domestic and foreign researchers devoted to studies of Ziegler-Natta catalytic systems based on neodymium, vanadium, and titanium modified with organochlorine compounds and used in the synthesis of polyolefins and polydienes are scrutinized. The relevant patent literature has been explored, and the main development trends in the field of metal complex catalysis using organochlorine compounds have been analyzed. The advantages and disadvantages of such catalytic systems are considered in comparison with classical unmodified catalysts, in which alkylaluminum chlorides are used as a source of chlorine. The authors analyzed in detail published data on the role of the chlorine atom as a ligand in active sites for the polymerization of olefins and dienes. The role of mono- and polychlorinated organic compounds in neodymium, vanadium, and titanium-magnesium catalytic systems has been revealed and described.