Abstract
The mechanism of space charge formation in polyethylene is discussed. The space charge distributions in various samples of polyethylene were measured with the pulsed electroacoustic technique (PEA). The moisture content of the polyethylene plays an important role in the formation and transport of space charge caused by injected electrons and holes or ionization of impurities, including by-products of cross-linking agents and catalyst residues. Polymer structures, such as straight chain, branch chain, co-monomer, and crystallinity, also influence space charge formation and transport in various ways.
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