Fig. 9

Frequency dependence of; (a) permittivity (ε′), (b) the dielectric loss (ε″), (c) the electrical conductivity (σ) for SBR loaded with various concentrations of jojoba powder/carbon black hybrid filler. (d) Changes in permittivity (ε′), dielectric loss (ε″) and loss tangent tanδ (the insert) as a function of hybrid filler loading at 100 Hz.