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Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

SILVEIRA, Flávia D. et al. Bis(n-butylcyclopentadienyl)zirconium dichloride ((nBuCp)2ZrCl2) immobilization on magnesium dichloride adducts (MgCl2.nEtOH) and its performance in ethylene homopolymerization. Polímeros [online]. 2000, vol.10, n.1, pp.42-48. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282000000100008.

This work describes the preparation of catalysts by the immobilization of bis(n-butylcyclopentadienyl)zirconium dichloride, (nBuCp)2ZrCl, on magnesium dichloride adducts, MgCl2.nEtOH. The metal content on the support, which varied from 0,5 to 1,5 wt.-% Zr/MgCl2 and the catalysts activity were dependent on the ethanol content. In the temperature immobilization range between 25 and 75°C, the highest Zr incorporation and polymerization yield were obtained with the catalyst prepared at 25°C. Based on the results obtained in this work, a series of reactions that may occur between the catalyst components during its preparation are proposed. The polyethylenes obtained were characterized by its molecular weight and polydispersivity.

Palavras-chave : Metallocene; magnesium dichloride; polyethylene.

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