A study of relationship between mechanical properties and watertreeing retardation in EVA blended XLPE

摘要

The authors report the relationship between the water treeretardation phenomena and the mechanical properties in ethylene vinylacetate (EVA) blended XLPE (cross-linked polyethylene). They alsostudied the electrical properties, such as the dissipation factor andthe AC breakdown strength. It has been found that, by blending with EVA,growth of water trees in XLPE is retarded considerably and the toughnesscorresponding to the stress-crack resistance of materials increases withthe VA content of blended samples. The results obtained indicate thatthe mechanical properties of the polymer have a strong influence on thewater tree growth and that the material properties of XLPE can beimproved substantially by EVA blending