Properties of phenyl silicone rubber
Source:iotachem.com
PostTime:2024-10-15 08:44:07
1. High temperature resistance: phenyl silicone rubber has excellent high temperature resistance, which is mainly due to the high chemical inertia and thermal stability of siloxanyl, which is not easy to decompose, and can maintain good elasticity and physical properties at high temperatures. In addition, the polarity of the siloxanyl group is small, and the interaction force between molecules is weak, so that it maintains good fluidity and elasticity at high temperatures.
2. Radiation resistance: When the phenyl content of phenyl silicone rubber is above 30%, it has excellent radiation resistance. With the increase of phenyl content, the rigidity of molecular chain increases, but the crystallization temperature increases.
3. Weather resistance and wear resistance: The weather resistance of phenyl silicone rubber is poor, because the existence of phenyl structure makes phenyl silicone rubber susceptible to ultraviolet radiation and oxidation reaction, resulting in aging and cracking. In addition, the aromatic ring structure of phenyl is also prone to cracking reaction, which affects the performance. In addition, the presence of siloxanyl is also the main reason for the poor wear resistance of phenyl silicone rubber, because siloxanyl is relatively soft and easy to wear during use.
4. Fire resistance: The fire resistance of phenyl silicone rubber is poor, because the phenyl structure contains a large number of aromatic rings, and these ring structures are prone to combustion. However, the presence of siloxanyl groups has a certain effect on the fire resistance of phenyl silicone rubber. The silicon-oxygen bond and the oxygen-oxygen bond in the siloxane group are very stable chemical bonds, which are not easy to burn, and can improve the fire resistance of phenyl silicone rubber. In addition, the siloxanyl group can release water when burning, which can play a cooling role, inhibit the spread of flame, and also help to improve the fire resistance of phenyl silicone rubber.
