The Reinforce of Precipitated Silica in Silicone Rubber
In silicone rubber, the reinforcing effect of precipitated silica is mainly reflected in the following aspects:
1. * * Improving Tear Resistance * *: Precipitation method silica as a filler can effectively disperse stress. When silicone rubber is subjected to external forces, the filler particles can prevent the diffusion of tearing, thereby improving the material's tear resistance performance.
2. * * Enhanced wear resistance * *: The hardness and particle shape of the filler have a significant impact on the wear resistance of silicone rubber. Precipitated silica can form a stable structure in silicone rubber and reduce wear.
3. * * Improving tensile strength * *: The addition of fillers can form physical cross-linking points in the silicone rubber matrix. When the material is stretched, these cross-linking points can prevent the slip of molecular chains, thereby improving the tensile strength of the material.
4. * * Increase hardness * *: The addition of precipitated silica can improve the Shore hardness of silicone rubber, making it more suitable for applications that require a certain degree of hardness.
5. * * Improving Elastic Modulus * *: Fillers can increase the elastic modulus of silicone rubber, making it have better resistance to deformation when subjected to external forces.
6. * * Optimizing Dynamic Performance * *: In dynamic applications such as seals, precipitation method silica can improve the dynamic performance of silicone rubber, including improving its compression resistance and rebound performance.
In order to achieve the best enhancement effect, precipitated silica is usually subjected to surface treatment, such as silane coupling agent treatment, to improve its compatibility and adhesion with the silicone rubber matrix. This treatment can enhance the interaction between fillers and rubber molecules, thereby further improving the mechanical properties of silicone rubber.