EXPERIMENTAL STUDIES AND MATHEMATICAL-MODELING OF THE KINETICS OF ETHYLENE POLYMERIZATION ON SUPPORTED TITANIUM MAGNESIUM CATALYSTS

The kinetic data on ethylene polymerization on highly active titanium- magnesium catalysts are presented. The kinetic curves of diverse shape s are found for the catalysts that differ in particle size and in the content of electron-donor modifying additives. A mathematical model fo r polymerization is proposed, which involves the kinetic scheme for fo rmation and deactivation of active sites and takes into consideration monomer diffusion in polymer particles. The parameters and constants o f individual stages of the polymerization process are determined by co rrelating experimental data and results of modeling.