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Ethylene polymerization catalyzed by diamide complexes of Ti(IV) and Zr(IV)
Author(s) -
Carone Carlos L. P.,
Fim Fabiana C.,
Bisatto Rubens,
Jahno Vanusca D.,
Lemos Cristóvão,
Basso Nara R. S.,
Einloft Sandra,
Galland Griselda Barrera
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28637
Subject(s) - ethylene , catalysis , zirconium , toluene , copolymer , polymerization , polymer chemistry , solvent , titanium , chemistry , 1 hexene , nuclear chemistry , organic chemistry , polymer
In this research, we describe the application of the complexes o ‐C 6 H 4 (NSiMe 3 ) 2 ZrCl 2 ( 1 ), o ‐C 6 H 4 (NSiMe 3 ) 2 TiBr 2 ( 2 ), o ‐C 6 H 4 (NSiMe 3 ) 2 TiCl 2 ( 3 ), C 2 H 4 (NSiMe 3 ) 2 ZrCl 2 ( 4 ), in the ethylene polymerization with different Al/M ratios and temperatures. These complexes presented significant catalytic activities in the presence of methyaluminoxane (MAO) as cocatalyst and toluene as solvent, producing high molecular weight linear polyethylenes. Zirconium complexes were more active at 60°C and titanium complexes at 40°C. Zirconium complex ( 1 ) showed the best values of activity (347 kg PE/mol Zr h atm) for Al/Zr ratio of 340 and 60°C of temperature. In ethylene‐1‐hexene copolymerization, the best result was also reached with catalyst 1 , at the same conditions. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008