High salinity wet electrical ageing behavior of polyolefin blends

摘要

Power delivery products (e.g. power cables) and accessories (e.g. joint, termination, and other solid dielectric components) experience ingress of moisture when employed underground or in submarine condition. Over years of services in a wet condition, power cables and other cable components degrade due to water treeing, resulting in reduction of electrical breakdown strength of cable system. Olefin diblock copolymer is a new designed polymer having “hard” polymer segments and “soft” copolymer segments by controlling composition distribution within a single polymer chain. In this study, the wet electrical breakdown behavior of polymer blends with low density polyethylene and olefin diblock copolymer is investigated in high salinity condition.