Electromechanical Behavior of Natural Rubber—lignocellulosic Material Composites

The mechanical and electrical properties of the natural rubber vulcanizates loaded with lignocellulosic materials were studied. It was found that the stress of vulcanizates decreased with initial fiber loading. Also, it was shown that the presence of fibers and an adhesion system greatly improves the aging resistance of the rubber composites. The resistivity ρ, dielectric permittivity ϵ′, and dielectric loss ϵ″ of the investigated samples were determined in the frequency range 102–105 Hz at room temperature. It was noticed that ϵ′ for bagasse pulp (Bp) is higher than that for cotton stalks pulp (Csp), which is attributed to the higher hemilignin content in Bp which is characterized with a low degree of polarization. An abrupt increase of ϵ″ at a higher content of Bp was noticed.