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Ethylene polymerizations with novel tantalum(V) aminopyridinato complex/MAO systems
Author(s) -
Hakala Kimmo,
Löfgren Barbro,
Polamo Mika,
Leskelä Markku
Publication year - 1997
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.1997.030180802
Subject(s) - tantalum , materials science , ethylene , polymer chemistry , polymer science , chemistry , organic chemistry , catalysis , metallurgy
The use of two kinds of tantalum(V) aminopyridinato complexes, bis(2‐benzylaminopyridinato)trichlorotantalum(V) and trichlorobis[2,6‐di(phenylamino)pyridinato‐ N , N ′]‐tantalum(V), activated by methylaluminoxane was studied in polymerization of ethylene. The activities of these homogeneous catalyst systems are comparable to those of metallocenes. The weight‐average molecular weights ( M̄ w ) of the produced polyethylenes are between 60 000 and 200 000 and M̄ w / M̄ n ≈ 2.