Polyisoprene-based block copolymers as supports for metallocene and post-metallocene catalytic systems toward ethylene polymerization

Abstract : In this work, we report how micellar structures obtained by the self-assembly in heptane of polyisoprene-block-poly(methyl methacrylate) (PI-b-PMMA) and polyisoprene-block-poly(ethylene oxide) (PI-b-PEO) can be effectively used as organic supports for ethylene polymerization catalyzed by metallocene and post-metallocene catalysts. The self-assembly in heptane of these block copolymers was demonstrated by means of dynamic light scattering and the influence of methylaluminoxane (MAO) on this self-assembly was analyzed. The so-formed assemblies, composed of either PMMA or PEO cores and PI corona, were used as organic supports for metallocene or post-metallocene catalysts with methylaluminoxane (MAO) as an activator, to produce micrometric polyethylene beads
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Submitted on : Friday, March 9, 2012 - 3:45:26 PM
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Bertrand Heurtefeu, Jules Oriou, Emmanuel Ibarboure, Eric Cloutet, Henri Cramail. Polyisoprene-based block copolymers as supports for metallocene and post-metallocene catalytic systems toward ethylene polymerization. New Journal of Chemistry, Royal Society of Chemistry, 2011, 35 (10), pp.2322-2332. ⟨10.1039/c1nj20309f⟩. ⟨hal-00677768⟩

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