Effects of polar molecules on direct current performance of EPDM for cable accessories

Abstract Due to the excellent insulation performance, ethylene-propylene-diene monomer (EPDM) is used as cable accessories. To obtain EPDM materials with high dielectric breakdown strength (DBS), special polar molecules and chemistry grafting/crosslinking technique are in this paper. In paper, we choose Maleic anhydride (MAH) an additive introduce deep traps, which generates increase strength(DBS) a decrease conductivity. The result shows that MAH can be grafted onto molecular chains process of cross-linking. Thermal stimulation currents (TSC) tests first-principles calculations consistently demonstrate charge inhibiting migration carriers, increasing DBS EPDM. grafting weight small, does not affect properties material.