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Enhanced activity of clays and its crucial role for the activity inethylene polymerization

Opened Access Enhanced activity of clays and its crucial role for the activity inethylene polymerization

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Autor: Camejo-Abreu, C.
Tabernero, Vanessa
Alba Carranza, María Dolores
Cuenca, Tomás
Terrero, Pilar
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2014
Publicado en: Journal of Molecular Catalysis A: Chemical, 393, 96-104.
Tipo de documento: Artículo
Resumen: This paper presents a study of the effects of different treatments on the polymerization activity of mod-ified clays as cocatalysts. To achieve this goal, an intercalating cation was introduced into two smectitesand these clays were then modified with trimethyl aluminium. The results for ethylene polymeriza-tion, when a zirconocene complex was used as catalyst, and the structure analysis, allow us to obtaininteresting deductions about the generation mode of the active species. All active materials employedas support activators presented aluminium in a pentahedral environment together with acidic hydrogenatoms. These two features were detected only after TMA treatment and they seem to be crucial elementsin active cocatalyst generation. Moreover, a material without structural aluminium displayed the bestactivity pointing to the new aluminium species generated in the solid matrix as the determining factorfor the activity. We proposed a synergic effect between Lewis acid aluminium centres...
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Cita: Camejo-Abreu, C., Tabernero, V., Alba Carranza, M.D., Cuenca, T. y Terrero, P. (2014). Enhanced activity of clays and its crucial role for the activity inethylene polymerization. Journal of Molecular Catalysis A: Chemical, 393, 96-104.
Tamaño: 765.3Kb
Formato: PDF

URI: http://hdl.handle.net/11441/68323

DOI: 10.1016/j.molcata.2014.05.030

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