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Polyaniline nanofibers for In situ MAO-catalyzed polymerization of ethylene

Authors

  • Nara Regina de Souza Basso,

    Corresponding author
    1. Faculdade de Química, Pontifícia Universidade Católica do Rio Grande do Sul-Brasil, Porto Alegre, Brazil
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  • Felipo Oliveira,

    1. Faculdade de Química, Pontifícia Universidade Católica do Rio Grande do Sul-Brasil, Porto Alegre, Brazil
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  • Ana Paula Graebin,

    1. Faculdade de Química, Pontifícia Universidade Católica do Rio Grande do Sul-Brasil, Porto Alegre, Brazil
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  • Cássio Stein Moura,

    1. Faculdade de Química, Pontifícia Universidade Católica do Rio Grande do Sul-Brasil, Porto Alegre, Brazil
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  • Fabiana de Carvalho Fim,

    1. Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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  • Griselda Barrera Galland,

    1. Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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  • Leila Bonnaud,

    1. Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS) and Materia Nova Research Center, Mons, Belgium
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  • Oltea Murariu,

    1. Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS) and Materia Nova Research Center, Mons, Belgium
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  • Philippe Dubois

    1. Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS) and Materia Nova Research Center, Mons, Belgium
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ABSTRACT

In this work electro-conductive polyaniline nanofibers (PAni-nanofibers) were prepared via interfacial methodology. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations revealed that the synthesized PAni-nanofibers present high aspect ratio with an average diameter of 80 nm, while they exhibit high conductivity (DC conductivity values: 4.19 ± 0.21 S cm−1). After specific treatment to remove moisture and remaining trapped HCl from PAni-nanofibers, it was possible to prepare promising polyethylene (PE)/PAni composites by in situ polymerization of ethylene using bis(cyclopentadienyl) zirconium(IV) dichloride (Cp2ZrCl2) and methylaluminoxane (MAO) as catalytic system. More precisely, various contents of PAni-nanofibers (from 0.2 to 7 wt %) were successfully incorporated in the in situ produced PE/PAni nanocomposites. PAni-nanofibers were found to affect significantly the crystallization of the polyolefinic matrix while preserving its thermal stability. Preliminary measurements of electric properties showed PAni-nanofibres are able to bring electro-conductive properties to the in situ polymerized PE/PAni composites. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41197.

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