This work presents the results on the preparation of new readily available zirconium-containing arylimine complex catalytic systems and their application together with metallocenes in ethylene polymerization. For this purpose, zirconium complexes with grafted ionic liquid type ligands were synthesized and tested in the ethylene polymerization process. On the other hand, it is known that one of the main industrial catalysts for the polymerization process of ethylene is dicycopentadienyl titanium and zirconium dichloride. Therefore, one of the main objectives of the work is to test the using of the newly synthesized complexes with the industrial Cp2TiCl2 catalyst. The products obtained were identified by various physicochemical methods and it was found that these catalytic systems allow one to control the structure and composition of the products obtained.

This paper presents the results of obtaining new easily preparing zirconium-containing complex catalytic systems for ethylene copolymerization and their theoretical studies. The synthesized arylimine metal complexes with “grafted” ionic-liquid ligands have been tested in the liquid-phase copolymerization process of ethylene in the aromatic solvents medium. It has been shown that the prepared catalytic systems can be used together with ionic liquids such as [bmim]BF4 and [bmim] HSO4. Using of organoaluminum compounds such as methylaluminiumoxane and (C2H5)2AlCl, these catalytic systems provide the formation of mixtures of the linear PE with high density, different thermodynamic characteristics, molecular mass distribution and crystallinity. It was found that these catalytic systems allow to control the structure and composition of the products obtained. It is known that in organometallic catalysis, ligands within a metal complexes play an important role in the formation of catalytic active centers. The nature of the catalytic centers also has a great influence on preparation of (co)polymers with various structures. Therefore, the choice of ligands is a very important factor for obtaining products with desired properties. The structural parameters of the synthesized catalytic systems were investigated using HyperChem software (version 8, Hypercube Inc.). Activation energy, dipole moment, bond angle, the bond length, the HOMO and LUMO orbitals have been calculated.