Polymerization of hex-1-ene initiated by diimine complexes of nickel and palladium

Abstract : The effect of monomer concentration, reaction temperature and initiator structure on the activity, molar mass, branching and thermal properties of poly(hex-1-ene)s was investigated for the polymerization of hex-1-ene initiated by four alpha-diimine complexes of nickel and palladium. Hex-1-ene polymerization exhibits an apparent negative kinetic order with respect to monomer concentration. Polymerization of hex-1-ene initiated by MAO activated 1,4-bis(2, 6-diisopropylphenyl)acenaphtenediiminenickel(II) dibromide (1a/MAO) proceeds in living-like fashion not only at sub-zero temperatures but even at 20degreesC. However, molar masses of the polymers are higher than predicted values in agreement with an initiator efficiency lower than one.
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https://hal.archives-ouvertes.fr/hal-00393813
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Submitted on : Tuesday, June 9, 2009 - 5:55:23 PM
Last modification on : Thursday, January 11, 2018 - 6:28:10 AM

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Jan Merna, Jaroslav Cihlar, Miloslav Kucera, Alain Deffieux, Henri Cramail. Polymerization of hex-1-ene initiated by diimine complexes of nickel and palladium. European Polymer Journal, Elsevier, 2005, 41 (29), pp.303-312. ⟨10.1016/j.europolymj.2004.09.013⟩. ⟨hal-00393813⟩

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