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Effect of Free Trimethylaluminum Content in Methylaluminoxane on Performances of Bis(salicylaldiminate)nickel( II )‐Based Catalysts for Ethylene Polymerization
Author(s) -
Carlini Carlo,
De Luise Valentina,
Grillo Fernandes Elizabeth,
Martinelli Marco,
Raspolli Galletti Anna Maria,
Sbrana Glauco
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500005
Subject(s) - methylaluminoxane , catalysis , ethylene , polyethylene , polymerization , polymer chemistry , nickel , phenol , chemistry , materials science , nuclear chemistry , organic chemistry , metallocene , polymer
Summary: The performances of ethylene polymerization catalysts based on III and commercial methylaluminoxane were investigated by reducing the content of free trimethylaluminum in methylaluminoxane by its reaction with 2,6‐di‐ tert ‐butylphenol. This allowed optimization of the formulation of the catalyst, affording a high‐molecular‐weight linear polyethylene (PE) with a productivity [(1 900 kg of PE/(mol of Ni × h)], ten‐fold higher than that previously achieved for the same system adopting commercial methylaluminoxane not pre‐treated with the above phenol derivative.