The dielectric loss decreases by the
vulcanization and compatibilization of the blend (Fig. 7).
AC conductivity (σac) values are obtained from the formula,
σac = f⋅ε1⋅tanδ = 1:8 × 1010ðSiemens = cmÞ;
where f is the frequency of measurement.
Fig. 8 gives a typical plot of AC conductivity as a function of
frequency for pure natural rubber, chitosan and blends of these two
systems. Natural rubber and chitosan shows non-linearity in AC
conductivity but the blends show a linear behavior. Fig. 9 shows the
AC conductivity curves for pure and modified NR90CS10 blends as a
function of frequency. The vulcanized material sample shows more
insulative compared to pure and MA treated blends.