Functionalized star-like polystyrenes as organic supports of a tridentate bis(imino)pyridinyliron/aluminic derivative catalytic system for ethylene polymerization

Abstract : Star-like polystyrenes composed of a microgel core with arms functionalized with a few hydroxy- or methoxy-ended ethylene oxide units were used as organic supports for a tridentate bis(imino)pyridinyliron catalyst towards ethylene polymerization. When used as supports of 2,6-bis[1-2,6(diisopropylphenyl)imino]ethylpyridynyl iron dichloride in the presence of various alkylaluminium compounds, the supported catalysts enabled the production, with a high catalytic activity, of polyethylene beads of a spherical morphology and high bulk density. A good control of the polyethylene molar mass distribution could also be achieved, which was explained by a lowering of the transfer reaction to the aluminium derivative, as compared to homogeneous conditions.
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Submitted on : Tuesday, June 9, 2009 - 6:14:32 PM
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Cécile Bouilhac, Eric Cloutet, Henri Cramail, Alain Deffieux, Daniel Taton. Functionalized star-like polystyrenes as organic supports of a tridentate bis(imino)pyridinyliron/aluminic derivative catalytic system for ethylene polymerization. Macromolecular Rapid Communications, Wiley-VCH Verlag, 2005, 26 (20), pp.1619-1625. ⟨10.1002/marc.200500430⟩. ⟨hal-00393816⟩

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