Influence of diffusion on some electrical properties of syntheticcables

摘要

It was shown previously that low-molecular-weight fractions ofcopolymers used in semiconductive compounds diffuse into the insulationduring the cable manufacturing process. In the present work, theinfluence of this diffusion on electrical properties such as AC, DC, andimpulse strength has been studied. Initial tests on thin cross-linkedpolyethylene films peeled from full-size cables have shown differenttrends. Interfacial diffusion has a detrimental effect on DC strength,but its effect on AC and impulse strength is not clear