A novel technique for preparation of electrically conductive ABS/Cu polymeric gradient composites

Abstract

A novel technique for preparing functionally gradient electrically conductive polymeric composites was developed by using of solution casting technique on the principle of Stokes’ law. Acrylonitrilebutadiene-styrene/Cu (ABS/Cu) gradient polymeric composites were prepared successfully using this technique. The gradient structures, electrically conductive performance and mechanical properties of the ABS/Cu composites were investigated. Optical microscope observation shows that the gradient distribution of Cu particles in ABS matrix was formed along their thickness-direction. The electrically conductive testing results indicate that the order of magnitude of surface resistivity was kept in 10₁₅ Ω at ABS rich side, while that declined to 10⁵ Ω at Cu particles rich side, and the percolation threshold was in the range of 2.82 vol%–4.74 vol% Cu content at Cu particles rich side. Mechanical test shows that the tensile strength reduced insignificantly as the content of Cu increases owing to the gradient distribution.

Keywords

electrically conductive composite / functionally gradient materials / Stokes’ law / solution casting / ABS / Cu

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