Titel: Two percolation thresholds in carbon nanotube epoxy composites
Sprache: Englisch
Autor/Autorin: Lott, Josef-Zoltan
Velagala, Bala S.
Schulte, Karl
Bauhofer, Wolfgang
Schlagwörter: Carbon nanotubes;Epoxy matrix;Electrical properties;Percolation;Network formation
Erscheinungsdatum: 2006
Quellenangabe: Composites Science and Technology (2006), doi:10.1016/j.compscitech.2006.02.037
Zusammenfassung (englisch): The results presented in this paper reveal the first evidence that two types of percolation thresholds can coexist in an insulator-conductor-system, the higher one attributed to a static and the lower one to a kinetic network formation process. Detailed measurements at concentrations above the statistical percolation threshold show a power law dependence of conductivity on filler concentration (with an exponent of 2.7) that is independent of the processing condition. A simplified model of percolated particles was developed in order to relate the sample conductivity to the contact resistance between individual particles embedded within a polymer matrix. Our results are compared with previous studies in order to correlate the contact resistance values to different materials and processing conditions.
URI: http://tubdok.tub.tuhh.de/handle/11420/268
URN: urn:nbn:de:gbv:830-tubdok-3359
DOI: 10.15480/882.266
Institut: Optische und Elektronische Materialien E-12
Optical and Electronic Materials E-12 (Materials in Electrical Engineering and Optics)
Dokumenttyp: Preprint (Vorabdruck)
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