Lott, Josef-ZoltanJosef-ZoltanLottVelagala, Bala S.Bala S.VelagalaSchulte, KarlKarlSchulteBauhofer, WolfgangWolfgangBauhofer2007-03-082007-03-082006Composites Science and Technology Volume 67, Issue 5, April 2007, Pages 922-928http://tubdok.tub.tuhh.de/handle/11420/268The 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.en2006922928Elsevierhttp://doku.b.tu-harburg.de/doku/lic_ohne_pod.phpCarbon nanotubesEpoxy matrixElectrical propertiesPercolationNetwork formationPhysikPreprinturn:nbn:de:gbv:830-tubdok-335910.15480/882.266NanoröhreEpoxidharzElektronische EigenschaftPerkolationNetzwerk11420/26810.1016/j.compscitech.2006.02.03710.15480/882.266930767706Preprint