EFFECTS OF CONSTITUENTS OF XLPE ON THE FORMATION OF SPACE-CHARGE

The effects of such constituents as the crosslinked part, non-crosslin ked LDPE part, antioxidant, and residual byproducts on the formation o f space charge in XLPE have been investigated. It has been found that homocharge is developed in the pure crosslinked part of XLPE. The non- crosslinked LDPE part encourages the formation of heterocharge, althou gh its influence is not strong. Residual byproducts generated during t he crosslinking reaction encourage the formation of heterocharge, wher eas antioxidant was found to prohibit the formation of heterocharge. O f these, residual byproducts have been found to impose the most pronou nced influence on the formation of heterocharge in XLPE, so that only heterocharge is found in an as-pressed XLPE with semiconductive electr odes.