Abstract

Abstract The reactions of the three-component polyolefin catalysts consisting of titanium trichloride (α-type), triethylaluminum, and various electron donor compounds have been investigated. Electron donors in a certain range of reactant ratios were found to accelerate the alkylation of the titanium ion remarkably at a temperature suitable for the polymerization of α-olenns. The roles of the electron donors have been discussed on the basis of the reaction behavior of the catalyst components and of the properties of the complexes which are thought to be the reaction intermediates.

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