Properties of Liquid Silicone Rubber
Liquid silicone rubber has the following advantages because of its special structure containing silicon-oxygen (si-o) links.
High and low temperature resistant. liquid silicone rubber is a product with heat resistance. Among various silicone rubbers, it can still maintain the characteristics of rubber shape after aging at 250℃ for thousands of hours or 300℃ for hundreds of hours in hot air. The glass transition temperature of phenyl silicone rubber is -140°C, and its vulcanizate can maintain elasticity at temperatures from -70°C to 100°C. high temperature.
2. It has excellent resistance to ozone aging, oxygen aging, light aging and weathering aging. The performance of silicone rubber vulcanizate will not show any change after being exposed to the sun outdoors for several years in a free state.
3. Excellent electrical insulation properties. The electrical insulation properties of silicone rubber vulcanizates change little when exposed to moisture or water and temperature rises. After burning, silicon dioxide will be formed, but it is still an insulator, which can ensure electrical equipment. Can continue to work until overhaul.
4. It is odorless, non-toxic, physiologically inert, and has no adverse effect on the human body.
5. It is not sticky to many materials and can play a role in isolation.
6. The air permeability is tens or even hundreds of times larger than that of ordinary rubber, and the air permeability of different gases is relatively different.
7. Oil resistance, radiation resistance and combustion resistance.
8. Good anti-mildew performance, silicone rubber can be stored for a long time, its water absorption performance is less than 0.015%, and it has no breeding effect on various algae and mold, so it will not mold. The main disadvantage of silicone rubber is that at room temperature, the tensile strength, tear strength and wear resistance of vulcanized rubber are much lower than those of natural rubber and other synthetic rubbers, and the acid resistance and alkali resistance are poor, and the price is relatively expensive. .