NEW TANDEM CATALYTIC SYSTEMS FOR ETHYLENE COPOLYMERIZATION WITH OCTENE-1

Currently, polyolefin production is developing rapidly, and the demand for polyolefin in the world market is constantly increasing. Progress in this field is achieved by improvement of polymerization technology and development of highly active catalytic systems. Despite the highly developed processes, there is still a need to increase metallocene and postmetallocene catalytic systems productivity and efficiency required to carry out (co)polymerization processes of olefins, including ethylene. In most cases, the use of additives, modifiers, tandem and mixed systems and various substrates is a topical issue to reduce environmental pollution and increase efficiency of these processes. Despite the advances in metal complex polymerization of olefins, there's always a need to develop simple, environmentally and economically viable catalytic systems for obtaining the highest quality products. The article deals with the development of new titanium-and zirconium arylamine complex catalytic systems and their use in combination with metallocenes in ethylene polymerization with octene-1. It was determined in the studies, that the synthesized arylamine complexes have a simple method of preparation. These complexes with cocatalysts (methylaluminumoxane, diethylaluminum chloride, etc.) can be easily used both in ethylene polymerization and copolymerization with olefins. The products obtained in the presence of these catalytic systems were analyzed by various physico-chemical methods. It has been shown that high-density polyethylene is obtained in their presence. Copolymer obtained by the use of octene-1 in copolymerization process has a more branched structure. The metal complexes were characterized by modern HyperChem and Gaussian programs. The possibilities of adjusting the structure and composition of the products obtained in these catalytic systems were studied