STUDIES ON THE KINETICS OF PROPYLENE POLYMERIZATION WITH THE COMPLEXTYPE TiCl3 CATALYST

The active center concentration C;, the rate constant k;, and the activation energy of chain propagation E;in the polymerization of propylene with complex-type TiCl;-（C;H;）;AlCl catalyst system were studied. The Mn was corrected by （?） value determined by GPC. The values thus obtained for C;, k;, and E;at 50℃were 3.01 mol/mol Ti, 6.27 1/mol·sec, and 5.10 Kcal/mol respectively.The kinetic parameters were compared with those obtained from conventional TiCl;·AlCl;catalyst, showing that the higher activity of the complex-type catalyst over the conventional catalyst is not only due to the higher C;of the former, but to a greater extent due to the increase of the k;value.