During installing the cable accessories

it is necessary to coat the insulation interface between the accessory insulation and the cable body insulation with silicone grease to ensure the sealing and electrical strength of the interface. However

in the long-term operation

the insulation silicone rubber of the accessory absorbs interfacial silicone grease

thereby reducing its own electrical and mechanical properties

and eventually causing the insulation failure of the accessories. This paper focuses on building a mathematical physical model of the molecular dynamic diffusion process of silicone grease in silicone rubber

which lays a theoretical foundation for the research of silicone rubber absorbing silicone grease. Moreover

the effects of silicone oilviscosity

silicone rubber inorganic filler content and temperature on saturated absorptivityfor silicone oil/silicone grease are studied. The results show that the diffusion process of silicone oil/silicone grease in silicone rubber follows the Langmuir diffusion model. The variation of saturated weight per unit volume of silicone rubber owing to the absorption forsilicone oil/silicone grease decreases with the increases of silicone oil viscosity and contents of aluminum hydroxide and silica in silicone rubber

but increases with the rise of temperature.