Keyword: «conductive polymer composites»

The effect of electrically conductive carbon black CH600 produced by Omsk Karbon Group on the electrical conductivity and mechanical properties of composite materials based on linear low-density polyethylene has been studied. It has been established that the filler provides high electrical conductivity of the studied composites in the range of 10–20 wt.%, significantly increases their modulus of elasticity and tensile strength, but at the same time reduces the relative elongation at break. Despite the ambiguous effect of the studied filler on the mechanical characteristics of composite materials, carbon black CH600 proved to be a highly efficient and promising filler for creating electrically conductive polymer composite materials based on linear low-density polyethylene.

This study investigated the electrical resistance and its temperature dependence of conductive polymer composite materials based on low-density polyethylene filled with conductive carbon black. Low- and highly dispersed fractions of carbon black were used in the fabrication of the composites. The ratio of maximum resistance to room-temperature resistance and the temperature of the transition from a positive to a negative temperature coefficient of resistance were determined for the studied composites. It was found that the use of low-dispersed carbon black in the fabrication of composites provides a significant increase in maximum resistance near the melting point of the matrix at the temperature of the transition from a positive to a negative temperature coefficient of resistance.