Effect of the alkylaluminum cocatalyst on ethylene polymerization by a nickel-diimine complex
作者： Roberto F. De Souza , Leonardo C. Simon , Raquel S. Mauler
DOI: 10.1002/(SICI)1099-0518(19991215)37:24<4656::AID-POLA24>3.0.CO;2-G
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摘要: Different chlorine-free alkylaluminum compounds were active cocatalysts for ethylene polymerization in the presence of 1,4-bis(2,6-diisopropylphenyl)-acenaphthenediimine-dichloronickel (II) (1). The combination 1 with trimethylaluminum or triisobutylaluminum produced catalytically species that polymerized productivities up to 469 kgpolymer/(molNi · h). activity catalytic system and properties polymeric materials influenced strongly by reaction temperature. polymers had a high molecular weight (up 642 × 103 g mol−1), increased time. polyethylenes branched, branching could be modulated proper choice parameters. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Chem 37: 4656–4663,
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