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[η 3 ‐methallyl‐nickel‐dad]PF 6 complex: new catalyst precursor for ethylene polymerization
Author(s) -
De Souza RobertoF.,
Mauler Raquel S.,
Simon Leonardo C.,
Nunes Fernanda F.,
Vescia Daniela V. S.,
Cavagnolli Alessandro
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.1997.030180907
Subject(s) - ethylene , branching (polymer chemistry) , catalysis , nickel , polymerization , polymer chemistry , materials science , polymer , chloride , chemistry , organic chemistry
The complex [η 3 ‐methallyl‐nickel‐dad]PF 6 is a new catalyst precursor for ethylene polymerization. The system is active in the presence of usual organoaluminium compounds like diethylaluminium chloride, at low Al/Ni ratios and under mild reaction conditions (temperatures between −10°C and 25°C, ethylene partial pressure from 1 to 15 atm). The polymers show extensive methyl branching, whose content is controlled by reaction parameters like temperature and ethylene pressure.