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RESEARCH PRODUCT

Titanium isodicyclopentadienide hemimetallocenes for ethylene/styrene copolymerization

Leo A. PaquetteFabrice GallouNadine PirioSébastien GentilPhilippe Meunier

subject

chemistry.chemical_classificationEthyleneMaterials sciencePolymers and PlasticsOrganic ChemistryGeneral Physics and AstronomyPolymerStyreneCatalysischemistry.chemical_compoundchemistryPolymerizationTacticityPolymer chemistryMaterials ChemistryCopolymerOrganic chemistryPolystyrene

description

Abstract The syndiotactic polymerization of styrene with exo-[(η5-isodiCp)TiCl3] 1/methylalumoxane (MAO; isodiCp=isodicyclopentadienyl) was studied as well as the ethylene/styrene copolymerization with exo-[{η5:η1(N)-isodiCp(SiMe2Nt-Bu)}TiCl2] 2/MAO. These two catalytic systems are stable during polymerization. The half-sandwich titanocene 1 exhibits good syndiospecificity and average activity. The bridged half-sandwich amino complex 2 was found to incorporate styrene into polymer chains at 70 °C. Activity results decrease with increasing styrene concentrations.

https://doi.org/10.1016/j.eurpolymj.2004.01.024