The study on the stability of fluorosilicone (fluorosilicone rubber) in extreme environments is an important topic. The following is a detailed analysis of its stability in extreme environments:


1. Stability in high temperature environments
Heat resistance:
Fluorosilicone has high heat resistance and can maintain stable performance in high temperature environments.
By adding heat stabilizers (such as iron, titanium, rare earth oxides, etc.), the heat resistance of fluorosilicone can be further improved, so that it still has sufficient stability at a high temperature of 250°C.
High temperature aging performance:
After long-term aging in a high temperature environment, fluorosilicone can still maintain good mechanical properties.
As the aging time increases, the glass transition temperature (Tg) of fluorosilicone may increase slightly, but the change is not significant; the storage modulus (E') and loss modulus (E") also hardly change with the increase of aging time.

2. Stability in low temperature environment
Cold resistance:
Fluorosilicone has good low temperature performance, and its brittle temperature is low. The brittle temperature of some types of fluorosilicone can reach -89℃.
In low temperature environment, fluorosilicone can maintain good elasticity and flexibility, and is not prone to brittle cracking.
Low temperature application:
Since the low temperature properties of fluorosilicone are better than those of fluorosilicone with C-C as the main chain, Rubber, so in the occasions that need low temperature resistance, fluorosilicone has a wider application prospect.

3. Oil resistance and solvent resistance
Oil resistance:
Fluorosilicone has excellent oil resistance and shows good stability to a variety of lubricating oils, hydraulic oils and synthetic oils.
In the environment of long-term contact with oily media, fluorosilicone can maintain good physical properties and chemical stability.
Solvent resistance:
Fluorosilicone shows good solvent resistance to a variety of solvents (such as aliphatic, aromatic and chlorinated hydrocarbon solvents).
This makes fluorosilicone have a wide range of application potential in occasions that require solvent resistance. force.

4. Stability in other extreme environments
Radiation resistance:
The radiation resistance of fluorosilicone is not outstanding, but its radiation aging resistance is better than some other types of rubber materials (such as methyl vinyl silicone rubber).
Chemical resistance:
Fluorosilicone shows good stability to a variety of chemicals and can maintain good performance in harsh chemical environments.
Weathering resistance:
Fluorosilicone has excellent weathering resistance and can maintain good physical properties and chemical stability even after years of exposure.

5. Summary
In summary, fluorosilicone shows good stability in extreme environments. In high temperature environments, fluorosilicone can maintain good mechanical properties and heat resistance; in low temperature environments, fluorosilicone has excellent cold resistance and flexibility; at the same time, fluorosilicone also has excellent oil resistance, solvent resistance, chemical resistance and weathering resistance. These characteristics make fluorosilicone have broad application prospects in aerospace, petrochemical, electronics and other fields. However, in practical applications, it is also necessary to select the appropriate type and formula of fluorosilicone according to the specific use environment and requirements to ensure its stability and reliability in extreme environments.