The bis(imino)pyridyl vanadium(III) complex [VCl 3-{2,6-bis[(2,6-iPr2C6H 3)N=C(Me)]2(C5H3N)}] activated with different aluminium cocatalysts (AlEt2Cl, Al2Et 3Cl3, MAO) promotes chemoselective 1,4-polymerization of butadiene with activity values higher than classical vanadium-chloride-based catalysts. The polymer structure depends on the nature of the cocatalyst employed. The MAO-activated complex was also found to be active in ethylene-butadiene copolymerization, producing copolymers with up to 45 mol-% of trans-1,4-butadiene. Crystalline polyethylene and trans-1,4-poly(butadiene) segments were detected in these copolymers by DSC and 13C NMR spectroscopy.

Homo e Copolymerisation of Butadiene catalysed by an Bis(imino)pyridyl Vanadium Catalyst

CUOMO, Cinzia;MILIONE, Stefano;GRASSI, Alfonso
2004

Abstract

The bis(imino)pyridyl vanadium(III) complex [VCl 3-{2,6-bis[(2,6-iPr2C6H 3)N=C(Me)]2(C5H3N)}] activated with different aluminium cocatalysts (AlEt2Cl, Al2Et 3Cl3, MAO) promotes chemoselective 1,4-polymerization of butadiene with activity values higher than classical vanadium-chloride-based catalysts. The polymer structure depends on the nature of the cocatalyst employed. The MAO-activated complex was also found to be active in ethylene-butadiene copolymerization, producing copolymers with up to 45 mol-% of trans-1,4-butadiene. Crystalline polyethylene and trans-1,4-poly(butadiene) segments were detected in these copolymers by DSC and 13C NMR spectroscopy.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/1021775
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