Ethylene Polymerization with Combinations of Early‐ and Late‐Transition Metal Catalysts Immobilized on MgCl₂ Supports

Abstract

Abstract Immobilization of combinations of early‐ and late‐transition metal catalysts on MgCl 2 supports has led to significant increases in catalyst activity when a nickel diimine is incorporated into a Fe‐, Cr‐ or Ti‐based catalyst system, and to the formation of intimately mixed, bimodal blends of high‐ and low‐molecular weight polyethylene via coimmobilization of Cr and Fe catalysts.