Ethylene polymerization using metallocenes supported on MgCl2/SiCl4−n (n-C6H13O)n
Authors: Morillo, Angel1; Parada, Alvaro1; Ibarra, Darmenia1; Passaglia, Elisa2; Arévalo, José1; Rajmankina, Tamara1
Source: Designed Monomers & Polymers, Volume 10, Number 6, 2007 , pp. 507-516(10)
Publisher: VSP, an imprint of Brill
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Abstract:
Metallocene complexes Cp2TiCl2, Cp2ZrCl2, Cp2Zr(NnBu2)2, Cp2Ti(η1-OC(O)C6H5)2 and Cp2Zr(η1-OC(O)C6H5)2 were supported on MgCl2/SiCl4−n (n-C6H13O)n carrier and used for ethylene polymerization. The supported complexes result in highly active catalysts when treated with different aluminum alkyl-based co-catalysts. These catalysts are able of tuning the final properties of the produced polyethylenes. Mixed composites of metallocenes and conventional Ziegler-Natta catalysts supported on the same carrier were also studied. A supported zirconocene Cp2Zr(η1-OC(O)C6H5)2 on MgCl2/SiCl4−n (n-C6H13O)n resulted in a highly active catalyst that eject control on the molecular weight, crystallinity and morphology of the resultant polyethylene.Keywords: METALLOCENE COMPLEXES; ETHYLENE POLYMERIZATION; CATALYTIC SUPPORT; HETEROGENIZATION; METALLOCENES/ZIEGLER-NATTA HYBRID CATALYSTS
Document Type: Research article
DOI: 10.1163/156855507782401187
Affiliations: 1: Laboratorio de Polímeros, Departamento de Química, Facultad Experimental de Ciencias, La Universidad del Zulia, Apartado 526, Maracaibo 4002-A, Venezuela 2: Dipartimento di Chimica e Chimica Industriale. Vía Risorgimiento 35, 56126 Pisa-Italia
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