Influence of MgO Nanofillers on a Novel LLDPE/HDPE Compound's Resistivity for HVDC Usage

Abstract

One important consideration for high-voltage direct current (HVDC) cable insulation systems is the resistivity level. Researchers have looked into using polymer nanocomposites as insulators in order to address this. The electrical qualities of HVDC cable insulation are significantly improved by these nanocomposites. The resistivity level of a compound made of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) filled with different amounts of MgO nanofiller was investigated experimentally in this work. The Design of Experiment (DOE) method was utilized in conjunction with a running test setup to design the 4-point probe measuring technique. The basic polymer composition was made up of 70:30 LLDPE to HDPE ratios. Finding the best sample with the fewest error fluctuations and a favorable resistivity pattern was the aim. Notably, under some circumstances, the addition of 5 weight percent MgO filler produced higher resistance than the 1 weight percent MgO filler. Our investigation leads us to the conclusion that a higher proportion of MgO nanofiller is associated with a higher resistivity, suggesting that this is a promising way to improve the insulating qualities of HVDC cables.