Fumed silica, as a crucial inorganic filler, plays a vital role in silicone rubber. By filling fumed silica, the mechanical, heat resistance, and weather resistance properties of silicone rubber can be significantly improved.

The filling amount, particle size distribution, and surface properties of fumed silica all influence the performance of silicone rubber. For example, an appropriate amount of fumed silica can enhance the tensile and tear strengths of silicone rubber, while uniform particle size distribution can improve its processability and surface finish.

Furthermore, the hydroxyl groups on the surface of fumed silica can interact with the siloxane bonds in silicone rubber, forming chemical bonds that enhance the stability and durability of the filling system.

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