STUDY OF STRUCTURE AND ELECTRICAL/DIELECTRIC PROPERTIES RELATIONSHIP OF BUTADIENE RUBBER/CARBON BLACK HYBRID COMPOSITE

Carbon black (CB) is the most frequently applied conductive additive in rubber and polymer composites. This project aims to investigate the electrical/dielectric properties of a hybrid composite based on butadiene rubber and N-234 type of low-cost CB prepared via an oxidative chlorophosphorylation reaction. The properties are described by conductivity (σ) and dielectric constant (έ) frequency dependence at ambient temperature. The conductivity mechanism is explored based on the structure of CB and composite measured by X-ray powder diffraction analysis. Graphite-like structure and semi-crystalline intercalate phase were observed in the X-ray powder diffraction patterns of CB and composite, respectively. The σ and έ obtained values show the positive contribution of CB filler in the electrical/dielectric properties of the modified polymer through enhancing the crystallinity, providing a new conductive pathway with a higher probability of charge carriers tunneling and founding a higher polarized system based on the microscopic structure of obtained composite. A low-cost conductive/polarized composite of higher permittivity in comparison to a modified polymer was obtained. The composite is suggested for use in energy storage and electric devices