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metadata.dc.type: | Artigo de Periódico |
Título : | Synthesis of a new zirconium catalyst for ethylene polymerization |
Otros títulos : | Journal of Polymer Science Part A: Polymer Chemistry |
Autor : | Fim, Fabiana de C. Machado, Tiago Sá, Denise Santos de Livotto, Paolo R. Rocha, Zênis N. da Basso, Nara Regina de Souza Galland, Griselda Barrera |
metadata.dc.creator: | Fim, Fabiana de C. Machado, Tiago Sá, Denise Santos de Livotto, Paolo R. Rocha, Zênis N. da Basso, Nara Regina de Souza Galland, Griselda Barrera |
Resumen : | A novel complex dichlorobis(2-ethyl-3-hydroxy-4-pyrone)zirconium(IV) (ZrCl2(ethylpyrone)2) was synthesized. Complexation of the pyrone ligand to the zirconium was confirmed by UV, 1H and 13C-NMR, and electrochemical studies. NMR showed the presence of four isomers and density functional theory calculations indicated that the main isomer had a cis configuration. The catalyst was shown to be active in ethylene polymerization in the presence of the cocatalyst methylaluminoxane. The highest catalyst activity for the zirconium complex was achieved at Al/Zr = 2500, 70 °C and when a small concentration of catalyst was used (1 μmol). |
Palabras clave : | Catalysis NMR Polyethylene (PE) Synthesis UV-vis spectroscopy |
metadata.dc.rights: | Acesso Aberto |
URI : | http://repositorio.ufba.br/ri/handle/ri/14041 |
Fecha de publicación : | 2008 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Química) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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10.1002pola.22734.pdf | 461,32 kB | Adobe PDF | Visualizar/Abrir |
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