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Fumed Silica
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- Time of issue:2019-08-21 00:00:00
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Grade Recommendation: HL-380 / HB-135 / HB- 620
Silicon rubber is ageing-resistant, high and low temperature resistant and electricity-insulated. However, the molecular chain of silicon rubber is soft, the interaction force is weak, so silicon rubber needs to be reinforced before actual usage.
RESOURCES
Fumed silica Fusil 150.PDF |
Fume silica is an ideal reinforcing agent for silicon 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 generates 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.
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