Phenyl Silicone Rubber (PhSR) is a type of silicone elastomer that has a phenyl group substituted for methyl in the backbone of the polymer chain. This substitution gives PhSR unique properties that make it highly useful in aerospace applications. Here are some advantages of Phenyl Silicone Rubber in aerospace:

Thermal stability: PhSR exhibits exceptional thermal stability compared to other elastomers. It can withstand high temperatures up to 250°C (482°F) and remain flexible even at low temperatures down to -60°C (-76°F). This property makes it ideal for use in components that are exposed to extreme temperatures, such as engine seals and gaskets.

Resistance to fluids: PhSR has excellent resistance to oils, fuels, and other fluids, which makes it an ideal material for use in seals, gaskets, and O-rings in aerospace applications. This property allows it to maintain its integrity and functionality in the presence of harsh chemicals and fuels used in aerospace.

High tensile strength: PhSR has a high tensile strength, making it suitable for use in applications that require high durability, such as fuel system components and O-rings.

Low outgassing: PhSR has low outgassing properties, which makes it suitable for use in spacecraft components, such as O-rings, seals, and gaskets. This property helps to prevent the buildup of gas in enclosed spaces, which can be detrimental to the performance of spacecraft.

Resistance to radiation: PhSR is highly resistant to radiation, making it ideal for use in applications that require exposure to high levels of radiation, such as space exploration.

In summary, the unique properties of Phenyl Silicone Rubber make it highly useful in aerospace applications, where it is necessary to maintain the integrity of components in extreme environments. Its thermal stability, resistance to fluids, high tensile strength, low outgassing, and resistance to radiation make it an ideal material for use in seals, gaskets, O-rings, and other critical components.