Abstract
Abstract A scaling relation of the electric conductivity behavior of high-density polyethylene (HDPE) composites loaded with carbon black (CB) and carbon fibers (CF) was studied. The results demonstrated, the curves of the scaled current density ( J s c ) versus the scaled electric field intensity ( E s c ) and the curves of a scaled conductivity ( σ s c ) versus J s c and E s c were linear in a bi-logarithmic coordinate system. There was a scaling relationship between the nonlinear electrical conductivity properties of the HDPE conductive composites; the HDPE/CB conductive composites satisfied an excessive degree relation, while the HDPE conductive composites reinforced with CF did not strictly satisfy a hyperscaling relation due to the CF weakening the nonlinear electric conductivity behavior of these composite. In addition, the introduction of the ethylene-vinyl acetate copolymer (EVA) into these composites was helpful to disperse the CB in the HDPE matrix, leading to presenting obviously linearity in a bi-logarithmic coordinate system.
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