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Ethylene Polymerization with Combinations of Early‐ and Late‐Transition Metal Catalysts Immobilized on MgCl 2 Supports
Author(s) -
Chadwick John C.,
Huang Rubin,
Kukalyekar Nileshkumar,
Rastogi Sanjay
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200751422
Subject(s) - catalysis , transition metal , ethylene , polyethylene , diimine , polymerization , nickel , metal , materials science , polymer chemistry , chemistry , chemical engineering , polymer , organic chemistry , engineering
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.