Ethylene polymerization with heterogeneous Ziegler-Natta catalysts

descriptionPublicationkeyboard_double_arrow_right Article 01 Sep 1995 English Publisher:Springer Science and Business Media LLCJournal:Polymer Bulletin, volume 34, pages 563-567 (issn: 0170-0839, eissn: 1436-2449,

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Authors: Luiz Claudio de Santa Maria; Fernanda M. B. Coutinho; Marcos L. Dias; Maria C. M. Gonçalves;

doi: 10.1007/bf00423352

Ethylene polymerization with heterogeneous Ziegler-Natta catalysts

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Abstract

TiCl4/SiO2, Ti(OC4H9)4/SiO2, MgCl2/TiCl4/SiO2 and MgCl2/Ti(OC4H9)4/SiO2 catalysts were prepared by treating silica gel with TiCl4, Ti(OC4H9)4, MgCl2/TiCl4 or MgCl2/Ti(OC4H9)4 in tetrahydrofuran (THF) solution. Ethylene polymerization was performed with these catalysts activated by common alkylaluminum compounds. The influence of magnesium dichloride on catalyst performance was investigated. MgCl2 has enhanced the catalyst activity for both titanium compounds. In addition, all catalyst systems were only active when they were washed with AlCl(C2H5)2 (DEAC).

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