Effects of gamma irradiation on resistivity and absorption currents in nanocomposites based on thermoplastic polymers

The functional characteristics depend strongly on the chemical structure of polymer and on the formulation of material, as well. In the present work, the effects of gamma irradiation at different doses on the resistivity and on the absorption currents in nanocomposites of thermoplastic polymers, such as low density polyethylene (LDPE), polypropylene (PP) and ethylene-propylene-diene monomer rubber (EPDM) are analysed. The influences of the polymer structure as host matrix (LDPE, PP, EPDM) and nano SiO₂ concentration (between 2 and 5 wt.%) on electrical features are discussed. A correlation between electrical and thermal properties is illustrated for all formulations.