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Ethylene-vinyl Acetate Thermoplastic Copolymers Filled with Multiwall Carbon Nanotubes: Effect of Hydrothermal Ageing on Mechanical, Thermal, and Electrical Properties

Authors

  • Olesja Starkova,

    Corresponding author
    1. Institute of Polymer Mechanics, University of Latvia, Aizkraukles 23, LV-1006 Riga, Latvia
    • Institute of Polymer Mechanics, University of Latvia, Aizkraukles 23, LV-1006 Riga, Latvia

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  • Samuel T. Buschhorn,

    1. Institut für Kunststoffe und Verbundwerkstoffe, Technische Universität Hamburg-Harburg, Denickestraße 15, D-21073 Hamburg, Germany
    2. Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA
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  • Luis Antônio Sanchez de Almeida Prado,

    1. Institut für Kunststoffe und Verbundwerkstoffe, Technische Universität Hamburg-Harburg, Denickestraße 15, D-21073 Hamburg, Germany
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  • Petra Pötschke,

    1. Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, 01069 Dresden, Germany
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  • Matthias Edelmann,

    1. Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, 01069 Dresden, Germany
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  • Karl Schulte

    1. Institut für Kunststoffe und Verbundwerkstoffe, Technische Universität Hamburg-Harburg, Denickestraße 15, D-21073 Hamburg, Germany
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Abstract

A range of properties of two commercial thermoplastic ethylene-vinyl acetate (EVA) copolymers, Elvax 420 and Elvax 450, neat and as melt-mixed composite filled with 15 wt.-% of multi-wall carbon nanotubes (MWCNTs), are studied in the “as produced” state and after hydrothermal ageing. Addition of MWCNTs into the neat copolymers introduces the functionality of electrical conductivity and significantly improves their mechanical properties, while thermal characteristics are slightly affected by the presence of carbon nanotubes. A remarkable increase of the elastic modulus (150%) and stress at failure (50%) in stress–strain experiments as well as creep resistance (40%) of the nanocomposites in comparison to the neat copolymers is achieved. Hydrothermal ageing results in deterioration of the elastic and ultimate properties of the materials, however its severe effect is less pronounced in the case of nanocomposites.mame201200422-gra-0001

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