Fumed Silica in Silicone Rubber applications
Fumed silica is an ideal reinforcing agent for silicone rubber. The strengthening is fundamentally brought about by silanol groups being interacted with or Si-methyl bonds being radically cleaved into the polymer. The surface silanol groups (Si-OH) of fumed silica react with silicone rubber macromolecule, then generate a silicon rubber molecular adsorption layer on the surface of silica, then a three-dimensional network structure is formed. This structure effectively limits the deformation of the silicone rubber molecular chain, thereby achieving the reinforcing effect.
Types of Silicone Rubber | Functions |
Room temperature-vulcanized (RTV) silicone rubber | improve tensile strength, abrasion resistance and hardness; |
High temperature-vulcanized (HTV) silicone rubber | greatly improve its strength, hardness and tear resistance |
High-transparent or high-strength silicone products | maintain great clarity, toughness, hardness and resilience |
Medical-grade silicone | non-toxic, non-hazardous, high safety, improve the mechanical strength |
Foamed flame retardant silicone rubber | Fumed silica works as reinforcing filler to ensure the strength of porous famed materials |
Liquid silicone rubber (LSR) | reinforce, improved tear resistance, high-temperature resistance, thickening thixotropy and high transparency |
Ceramic silicone rubber | reinforcement, improve material elastic deformation performance and tensile strength, flame retardant |