Ethylene polymerization using metallocenes supported on MgCl₂/SiCl_4−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/SiCl_4−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/SiCl_4−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: http://dx.doi.org/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

Publication date: 2007-11-01