Fluorosilicone (also known as fluorosilicone rubber) is a high-performance elastomer that combines the properties of organic silicone and organic fluorine materials, and its heat resistance is particularly outstanding. The following is a detailed analysis of the heat resistance of fluorosilicone:
1. Overview of heat resistance
Fluorosilicone has excellent high temperature resistance and can maintain stable physical and chemical properties under extreme temperature conditions. Its high temperature resistance is generally better than that of ordinary silicone rubber and fluororubber. It can be used for a long time in the range of -50℃ to +200℃ (even -70℃ to 260℃), and the short-term temperature resistance can reach 250℃.
2. Factors affecting heat resistance
Molecular structure: The main chain of fluorosilicone contains a flexible Si-O structure, which makes it have high thermal stability. At the same time, the introduction of fluorine atoms enhances the high temperature resistance of the material.
Additives: The high temperature stability of fluorosilicone can be significantly improved by adding heat stabilizers such as titanium, iron or rare earth oxides. These additives can react with the active groups in the molecular chain of fluorosilicone to form stable chemical bonds, thereby improving the heat resistance of the material.
Use environment: The heat resistance of fluorosilicone is also affected by the use environment, such as temperature, pressure, medium, etc. In high temperature, high pressure and corrosive medium, the heat resistance of fluorosilicone may be affected to a certain extent.
3. Heat resistance test and verification
In order to verify the heat resistance of fluorosilicone, a series of experimental tests are usually required. These tests include thermogravimetric analysis, thermal oxidation stability test, high temperature tensile strength test, etc. Through these tests, the stability, oxidation rate and mechanical properties of fluorosilicone at high temperature can be evaluated.
4. Application field
Due to its excellent heat resistance, fluorosilicone is widely used in occasions that require high temperature resistance. For example:
Aerospace: used to manufacture fuel system seals, hydraulic bellows and other components to ensure stable operation under high temperature and high pressure environment.
Automotive industry: used to manufacture engine oil seals, fuel hoses and other components, which can withstand high temperature and fuel erosion.
Medical equipment: used to manufacture medical supplies such as artificial blood vessels and corrosion-resistant catheters to ensure safety and reliability during high temperature disinfection and long-term use.
5. Summary
In summary, fluorosilicone has excellent heat resistance and can maintain stable physical and chemical properties under extreme temperature conditions. Its high temperature stability can be further improved through reasonable formula design and the addition of additives. Therefore, fluorosilicone has broad application prospects in aerospace, automotive industry, medical equipment and other fields.
