High catalytic activity of SBA-15-supported metallocene toward ethylene polymerization: The effect of the ordered porous structure of the support

Covarrubias, C; Quijada, R

Abstract

The catalytic activity of the (nBuCp)2ZrCl2 metallocene supported on ordered SBA-15 mesoporous silica and on traditional amorphous silica toward the polymerization of ethylene is studied. High activity values were obtained with the SBA-15-supported catalyst (6953-8407 kg mol-1 Zr bar-1 h-1), which were significantly higher than those presented by the catalyst supported on amorphous silica (959-4234 kg mol-1 Zr bar-1 h-1). The highly ordered mesoporous structure of SBA-15 affords a more homogeneous distribution of the metallocene on the support surface and improves accessibility during metallocene activation and monomer insertion. Polyethylene (PE) synthesized with the SBA-15-supported catalyst retains the molecular weight distribution of the PE produced with the single-site homogeneous metallocene, making the SBA-15-supported catalyst a promising heterogeneous metallocene system. © 2008 Elsevier B.V. All rights reserved.

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Título según WOS: High catalytic activity of SBA-15-supported metallocene toward ethylene polymerization: The effect of the ordered porous structure of the support
Título según SCOPUS: High catalytic activity of SBA-15-supported metallocene toward ethylene polymerization: The effect of the ordered porous structure of the support
Título de la Revista: CATALYSIS COMMUNICATIONS
Volumen: 10
Número: 6
Editorial: Elsevier
Fecha de publicación: 2009
Página de inicio: 995
Página final: 1001
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S1566736708005797
DOI:

10.1016/j.catcom.2008.12.046

Notas: ISI, SCOPUS