Influence of Bismaleimide HVA-2 Grafting on the Direct Current Dielectric Properties of XLPE

In this paper, N, N’-m-phenylene dimaleimide (HVA-2) grafted crosslinked polyethylene (XLPE) insulation materials with different HVA-2 contents were prepared. The grafting, crosslinking, and crystalline structure characterized by Fourier-transform infrared spectroscopy (FTIR), Soxhlet extraction, differential scanning calorimetry (DSC), respectively. space charge distribution, direct current (DC) breakdown strength, DC conduction density tested the electronic was calculated from first-principles. grafting modification can significantly reduce accumulation of charges XLPE, but have a negative effect on strength. polar groups anchored XLPE reaction introduce deep traps densely evenly in which would capture scatter carriers, thus reducing carrier concentration mobility further improving distribution density. However, increase crosslinking extent to make crystallinity decrease crystallization inhomogeous, leading certain strength XLPE.