pure rubberis very low, when mixednano silica (VK-SR01) After reinforcing the filler, the tensile strength of the vulcanizate is improvednano silica (VK-SR01) The use of fillers plays an important role in the final performance of silicone rubber.
nano-silica is a better filler for reinforcing high temperature vulcanized silicone rubber. Nano-silica aggregates have a good reinforcing effect on silicone rubber, and the rubber is addednano silica (VK-SR01) After the powder, a microcrystalline region with silica as the crystal nucleus is formed, which increases the physical crosslinking point, is more likely to crystallize, and the strength of the rubber can be significantly improved.
Nano-silica in Rubber:
as reinforcing agent and anti-aging agentnano silica (VK-SR01) is applied to rubber products, which can improve the strength of rubber products, improve toughness, prevent aging, resist friction and fire, and extend life.
nano-silica isRTVthe reinforcing filler of silicone rubber can improve its strength. On the one hand, it is due to the small size effect of nano-dioxide particles and the large specific surface area;On the other hand, because its surface contains a lot of silicon light groups, the particles can form a network structure through the action of hydrogen bonds and van der Waals forces. At the same time, the silica particles will also have a strong interaction with polysiloxane molecules, improving the interface condition. The reinforcing effect of nano-silica on silicone rubber is affected by its particle size, specific surface area and structure. Generally, the smaller the particle size, the larger the specific surface area, the higher the structure, the better the reinforcing effect, and the strength of the vulcanized rubber, The higher the hardness.
silicone rubber:3.0-30%;polysulfide rubber:0.1-5%;
mix raw rubber, hydroxyl silicone oil andnano silica (VK-SR01) is mixed evenly on a double-roll rubber mixing machine, and the mixed rubber is thin and out of the film.170℃heat treatment2h, add vulcanizing agent to the refining, thin through out of the sheet, the next day on the vulcanizing machine molding. The vulcanization conditions are175℃ × t90.t90for useLH-90type vulcanizer to measure the positive vulcanization time of vulcanized rubber.
added to rubbernano silica (VK-SR01), pay attention to the degree of dispersion in the polymer. The dispersion degree of nano-silica in the system has a great influence on the rubber performance. In the transparent rubber system, the higher the transparency, the better the dispersion degree of nano-silica.
Storage method:nano-silica should be stored in a dry and closed environment and not exposed to volatile substances.