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The main objective of this work is to study the influence of foaming on the percolation threshold of carbon black-filled polymer composites. The electrical conductivity, structure and tensile strength properties of solid and foamed ethylene butyl-acrylate/carbon black composites were investigated. The percolation threshold of solid composites was 10.9vol.%, whereas for composite foams it decreased...
A theoretical model is proposed to describe the deformation dependence of the dc-conductivity in composites in which tunneling is the dominant mechanism of charge carrier transport. It is experimentally shown that carbon black filled composites exhibit three different types of deformation behavior of the conductivity depending on the filler concentration. The model proposed explains these types of...
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