The Change of Mechanical Properties of HTV Silicone Rubber due to Liquids Permeation

The high temperature vulcanized (HTV) silicone rubber materials have been proved to be a good polymeric materials for outdoor insulation, due to its excellent hydrophobicity and hydrophobicity transfer properties which can significantly decrease the leakage current. In addition, another major function of the silicone rubber housing is to protect the fibre reinforced polymer (FRP) rod from damage, which requires the silicone rubber housing has good mechanical properties. In actual use, silicone rubber housing would suffer various kinds of environmental stress, such as rain, acid rain, pollutant accumulation, ultraviolet exposure and so on. In all of these environmental stress, liquids permeation is considered to play a major factor in silicone rubber aging. In our previous study, the change…