https://repositorio.ufba.br/handle/ri/14904
Tipo: | Artigo de Periódico |
Título: | Flavone complexes of Ti and Zr active in ethylene polymerization |
Título(s) alternativo(s): | Applied Catalysis A: General |
Autor(es): | Gheno, Grasiela Basso, Nara Regina de Souza Ceschi, Marco Antônio Livotto, Paolo R. Nascimento, Alanjone Azevedo Rocha, Zênis N. da Galland, Griselda Barrera |
Autor(es): | Gheno, Grasiela Basso, Nara Regina de Souza Ceschi, Marco Antônio Livotto, Paolo R. Nascimento, Alanjone Azevedo Rocha, Zênis N. da Galland, Griselda Barrera |
Abstract: | Two new complexes of Ti and Zr were synthesized with 3-hydroxyflavone bidentate ligand and investigated in homogeneous ethylene polymerization. Both complexes were characterized by UV–VIS, 1H and 13C NMR, and electrochemical studies. The geometries and energies of all possible isomeric species were studied by full unconstrained optimizations performed at Density Functional Theory (DFT) level. The polymerization reactions were performed at different experimental conditions with methylaluminoxane (MAO), as the cocatalyst. Both complexes were active in ethylene polymerization in all the conditions used. However, zirconium complex showed the best activity comparing to the titanium complex at 2500 Al/M ratio. The polymers obtained were high density polyethylene with ultra high molecular weights. |
Palavras-chave: | Synthesis Complex 3-Hydroxyflavone Catalyst Polyethylene |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14904 |
Data do documento: | 2013 |
Aparece nas coleções: | Artigo Publicado em Periódico (Química) |
Arquivo | Descrição | Tamanho | Formato | |
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1-s2.0-S0926860X13004997-main.pdf | 2,27 MB | Adobe PDF | Visualizar/Abrir |
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