Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/8911
Título: A new post-metallocene-ti catalyst with maltolate bidentade ligand: an investigation in heterogeneous polymerization reactions in different mesoporous supports
Autor: Gheno, Grasiela
Basso, Nara Regina de Souza
Livotto, Paolo Roberto
Ribeiro, Maria Rosário
Lourenço, J. P.
Ferreira, Ana Elisa
Galland, Griselda Barrera
Palavras-chave: Catalysis
Synthesis
Mesoporous support
Immobilization
Polyethylene
Data: 2016
Editora: Brazilian Chemical Society
Resumo: A new titanium catalyst easily synthesized from ethylmaltol bidentate chelator ligand was studied in homogeneous and heterogeneous ethylene polymerization. The dichlorobis(3-hydroxy-2-ethyl-4-pyrone)titanium(IV) complex was characterized by 1H and 13C NMR (nuclear magnetic resonance), UV-Vis and elemental analysis. Theoretical study by density functional theory (DFT) showed that the complex chlorines exhibit cis configuration, which is important for the activity in olefin polymerization. The complex was supported by two methods, direct impregnation or methylaluminoxane (MAO) pre-treatment, in five mesoporous supports: MCM-41 (micro and nano), SBA-15 and also the corresponding modified Al species. All the catalytic systems were active in ethylene polymerization and the catalytic activity was strongly influenced by the method of immobilization of the catalyst and the type of support.
Peer review: yes
URI: http://hdl.handle.net/10400.1/8911
DOI: http://dx.doi.org/10.5935/0103-5053.20160099
ISSN: 0103-5053
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)

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