Rapid Report Polymerisation of ethylene catalysed by mono-imine-2,6-diacetylpyridine iron/methylaluminoxane (MAO) catalyst system: effect of the ligand on polymer microstructure

摘要

The complex, {1-{6-[(2,6-diisopropylphenyl)-ethaneimidoyl]-2-pyridinyl}-1-ethanone} iron (II) dichloride (2), has been synthesised and characterised. Treatment of complex 2 with methylaluminoxane resulted in a very active catalytic system for the preparation of polyethylene (PE). The system shows activities in the order of magnitude 10~7 g (PE) mol~(-1) (Fe) h~(-1) bar~(-1). Characterisation by ~(13)C NMR indicated that branched PE was obtained and that experimental conditions affect polymer microstructure. PE produced contained six to eight branches per 100 carbons.