Electrical Properties and SEM Study of Foamed EBA/Carbon Black Composites

Abstract

Electrical properties and morphology of carbon black (CB) filled ethylene-butyl-acrylate copolymer (EBA) composites were studied in compact and chemically foamed versions. Conductivity percolation threshold for foamed composites was lowered by five weight percent of carbon black concentration. It means that the same conductivity values were achieved at reduced concentration of filler than for non-foamed version of composite. As a result semiconducting material with reduced density (weight) and content of carbon black is obtained. The sensitivity of foamed composite conductivity to mechanical stimulus induced by uniaxial compression was observed.