The dielectric loss heating of high-temperature vulcanized silicone rubber sheds and sheaths after water and moisture absorption may lead to the occurrence of local temperature rise in a silicone rubber composite insulator. The water and moisture absorptivity of a silicone rubber may be influenced by multiple factors. Consequently

we studied the influences of inorganic filler property

temperature

solution concentration and tensile strain on the water absorptivity of the silicone rubber immersed in the aqueous solutions of atypical contaminants

including sodium hydroxide

glucose and calcium sulfate

by using the weight method

and studied the effects of the solution immersion on the physicochemical properties of silicone rubber by using modern methods for material analysis. Results indicate that the hydrophobicity treatment on an inorganic filler surface weakens the water absorption of the silicone rubber immersed in the solutions

the tensile strain accelerates and increases its water absorption

and the high-temperature solution immersion lowers its activation energy and thermostability.The variation law of water absorptivity of the high temperature vulcanized silicone rubber in the atypical contaminants was supplementarily studied.