Kinetlcs of Gaseous Propylene Polymerization over TiCl₃-AlEt₃ Catalyst

Abstract

Propylene polymerization over TiCl₃-AlEt₃ catalyst in the absence of solvent have been carried out at various values of propylene pressure, P, molar ratio of AlEt₃ to TiCl₃, (A)and polymerization temperature. The kinetic curves(polymerization rate vs. time)are lower than those in the case with solvent and stationary has been represented by R R (K(A)jp K(A)P), were R is the stati nary rate in the case with solvent. The rate constant and activation energy(12 kca1 mo1)of propagation and the concentration of polymerizatio centers(1 x 1 2mollmo1-TiCI8)are same with those in the case with solvent. B t the average lifetimes of the growing chains(24 min)were shorter than those(40 min)in the case with solvent.