Correlation between percolation behavior of electricity and viscoelasticity for graphite filled high density polyethylene

摘要: Abstract A study on the correlation between electrical percolation and viscoelastic for graphite (GP) filled high-density polyethylene (HDPE) conductive composites was carried out through an examination of filler concentration φ dependence volume resistivity ρ dynamic functions. The frequency ω G ′ at low s decreased obviously with increasing GP concentration. relationship proportion storage modulus to that polymer matrix, namely relative ( c / p ), region studied. It is found there are two critical threshold, r1 r2 , in plots ∼ which close threshold 1 2 respectively. Moreover, exists -dependence loss tangent (tan  δ ) a peak plot tan  versus when approaches angle (8 vol%). When >20%, second shows almost no content. threshold. modified Kerner–Nielson equation also obtained used analyze formation network structure matrix by substituting variable parameter K constant . results indicate increases discontinuously revealing this associated concentration, Furthermore, GP/HDPE can be verified basis equation.