Abstract
AbstractPolymerization of ethylene with ball‐milled titanium dichloride leads to a completely linear polymer with terminal unsaturation corresponding to approximately one carbon–carbon double bond per molecule. Polymerization rate is first‐order in both monomer and catalyst concentration at 140°C. Due to a thermal deactivation of the catalyst, the polymerization rate falls sharply with temperature above 180°C. Propylene and butene‐1 will copolymerization with ethylene in this system, propylene more efficiently than butene‐1. Evidence for copolymerization of trans‐2‐butene, but not of the cis‐isomer or of isobutene, in trace concentrations is presented. Propylene is homopolymerized to a product low in isotactic content. The significance of the structural and (limited) kinetic data in terms of the mechanism of polymerization are discussed.
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Schedule a callMore From: Journal of Polymer Science Part A-1: Polymer Chemistry
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