269 / 2022-03-14 23:30:09

Influence of Three-dimensional Boron Nitride Foam on Thermal Conductivity and Charge Transport Behavior for Polypropylene/Elastomer Blends

Polypropylene,Elastomer,Boron Nitride,Thermal Conductivity,Charge Transport

Polypropylene (PP)/elastomer blend is a promising candidate for eco-friendly high voltage direct current (HVDC) cable insulation. However, the thermal conductivity of PP/elastomer blend is low, which can lead to the temperature gradient across the cable insulation thickness because of the Joule heat originated from the current in cable conductor. Temperature gradient influences the charge injection and migration and leads to the gradient of insulation resistance and electrical field. Therefore, improving the thermal conductivity of PP/elastomer blend is necessary. In this paper, a self-support and pressure reinforced three-dimensional boron nitride (3D-BN) foam was added into PP/propylene-based elastomer (PBE) blend. Thermal conductivity and microstructure were estimated, and the influence of 3D-BN foam on charge transport behavior was investigated.