The effect of blend on DC breakdown and conduction characteristics of LDPE

Abstract

In this work, we prepared some specimens by blending the two kinds of low density polyethylene (LDPE) with a 0.9179 or 0.9192 g/cm/sup 3/, according to different ratios. The specimens are classified by the blend ratio of the contents of LDPE with 0.9192 g/cm/sup 3/ to that with 0.9179 g/cm/sup 3/. For these specimens, we study the effect of the blend on DC breakdown and conduction current characteristics at 30/spl deg/C and 90/spl deg/C. From the results of DC breakdown experiments, it is confirmed that the DC breakdown strength decreases with the increase of the blend ratio at 30/spl deg/C. The specimens with blend ratios of 25 wt% and 75 wt%, however, have a lower breakdown strength than the others at 90/spl deg/C. The current densities of specimens increase with the increase of blend ratio at 30/spl deg/C. On the other hand, current density is decreased with the increase of blend ratio up to 75 wt% at 90/spl deg/C.