The polymerization of ethylene and butadiene on “dry” combined catalyst prepared from α-TiCl3

Abstract

Most authors studying polymerization in the presence of heterogeneous combined catalysts have dealt with processes taking place in a medium of inert organic solvents. However, the so-called “dry” catalysts, i.e. systems containing no liquid components, have a number of specific features which are also of interest to investigators. The use of these “dry” catalysts makes it possible to study polymerization processes under conditions which eliminate the effect of a number of factors which are unavoidable with the usual Ziegler systems, e.g. the presence of a solvent, excess of a metal alkyl, etc. Dry catalysts are usually prepared by reacting a transition metal halide with different metal alkyls in the liquid [1] or vapour states [2, 3] with subsequent elimination of the liquid and gaseous products of the reaction.In this paper we are reporting on a study of some kinetic features of the polymerization of ethylene and butadiene using dry combined catalysts based on α-TiCl3.