The mechanical strength of pure rubber is quite low. However, the tensile strength of vulcanized rubber can be improved from 0.35MPa to 14MPa and reinforcement rate can be 40 times higher than common rubber when the rubber is mixed with nano silica to reinforce mechanical strength.
Nano silica is the best filler which can reinforce high temperature vulcanized silicone rubber. After adding our nano silica for rubber use, silica nanoparticles aggregates on the silicone rubber to form microcrystalline with silicon dioxide as nucleation zone, which increases the physical cross linking points and make it easier for crystallization. By adding nano SiO2,the rubber strength can be increased 40 times.