Dielectric properties of MWCNT based polymer composites close and below percolation threshold

J. Macutkevic, D. Seliuta, G. Valusis, J. Banys, P. Kuzhir, S. Maksimenko, V. Kuznetsov, S. Moseenkov, A. Usolseva, I. Mazov, A. Ischenko, P. Lambin

    Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

    Résumé

    Results of broadband (20 Hz-1 MHz) dielectric spectroscopy of multi-wall carbon nanotubes/polymethylmethacrylate composites with low loading of the carbon fillers (up to 0.5 wt%) are reported. The temperature behaviour of complex dielectric permittivity of MWCNT/PMMA composites with 0.25 wt % is similar to the pure PMMA polymer. However, the dielectric permittivity and electric conductivity of composites with 0.5 wt% are very high and both parameters are almost temperature independent. The high complex dielectric permittivity of these composites indicates the onset of percolation threshold. The relaxation time of β relaxation is shorter in MWCNT/PMMA composites than in pure PMMA.
    langue originaleAnglais
    Pages (de - à)2814-2816
    Nombre de pages3
    journalPhysica Status Solidi (C) Current Topics in Solid State Physics
    Volume6
    Numéro de publication12
    Les DOIs
    Etat de la publicationPublié - 1 janv. 2009

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