Title: Alternating Ethylene−Styrene Copolymerization with a Methylaluminoxane-Free Half-Titanocene Catalyst
Abstract: Copolymerization of ethylene and styrene in the presence of the catalytic system η5-C5Me5Ti(CH2Ph)3−B(C6F5)3 has been investigated. Independently from the feed composition, basically alternating ethylene−styrene copolymers are obtained, together with some polyethylene and syndiotactic polystyrene, from which the former can be separated by solvent extraction. NMR analysis of suitably 13C-enriched end groups shows that the regiospecificity of styrene insertion in the initiation step is largely secondary. A tentative explanation for the preferentially alternating comonomer incorporation is proposed.
Publication Year: 1996
Publication Date: 1996-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 102
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