rheology, morphology and electrical conductivity of polyethylene (pe)/ethylene vinyl acetate (eva) blends filled with carbon black

In this research with main objective of preparing semi-conductive compunds of carbon black (cb) filled polyethylene (pe)/ethylene vinyl acetate (eva) blends applied for medium volatge cables, the effect of carbon black amount (10, 15, 20 wt.%) on pe/eva (50/50 wt.%) blend electrical resistivity in relation to its rhological and microstructure characteristics is investigated. electrical resistivity measurments indicate only the blend with 15 wt.% of cb could act as a semi-conductive compund. rheologcal studies and sem micrograpghs observations reveal, incontrary to the blend with 10 wt.% cb, there is interconection between cb particles in both the blends with 15 wt.% and 20 wt.% cb. however, cb intercnection is less for the blend with 15 wt.% cb, so that this concentration of cb is predicted around the percolation thershould