This article is cited in 10 papers

Modeling electric conduction in composite materials based on polypropylene and carbon black

A. S. Stepashkina^a, E. S. Tsobkallo^b, O. A. Moskalyuk^a, A. N. Aleshin<sup>c

a</sup> St. Petersburg State University of Technology and Design
^b Peter the Great St. Petersburg Polytechnic University
^c Ioffe Institute, St. Petersburg

Abstract: We have created a composite material based on polypropylene (PP) with carbon black as the filler. The dependence of the electric resistivity of the composite on the filler mass fraction has been experimentally studied. It is established that this dependence has a threshold character and the material retains dielectric properties at filler concentrations below the percolation threshold. Above the threshold, the resistivity drops by from eight to ten orders of magnitude. A theoretical description of the electric conduction of the composite is proposed, and it is shown that theoretical values of the conductivity quite satisfactorily coincide with experimental data. The process of electric conduction of the composite material has been simulated in order to determine the percolation threshold by the Monte Carlo method.

Received: 03.07.2014

 English version: Technical Physics Letters, 2015, 41:1, 57–59

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