Observation of electrical breakdown and space charge formation in acetophenone-coated LDPE film under AC voltage application

This paper deals with the effect of acetophenone on dielectric properties such as tan δ and capacitance and on space charge formation up to electrical breakdown under the AC voltage application in acetophenone-coated low density polyethylene (LDPE) film. The existence of acetophenone at the electrode interface enhance tan δ. Tanδ increased with electric field and decreased inversely proportional to the frequency in the high field and high temperature region in acetophenone-coated specimen. AC breakdown test gave the result that the electric strength in non-coated specimen was higher than that in acetophenone-coated one and that the electric strength also decreased with temperature