In extreme conditions such as aerospace and nuclear industries, materials often need to withstand the dual challenges of cryogenics and high-energy radiation. Phenyl silicone rubber (PVMQ), due to its unique molecular structure, has become the preferred material for such harsh environments.

A "Frost-Resistant" to Break Through Extreme Cold Limits: Ordinary silicone rubber tends to crystallize and harden at low temperatures, causing the material to become brittle. Phenyl silicone rubber effectively disrupts this structural regularity by introducing large-volume phenyl groups into the molecular chain, hindering the tight arrangement of the molecular chains. When the phenyl molar fraction reaches 5%~10% (low phenyl), the glass transition temperature of the material can be significantly reduced to around -115℃, allowing it to maintain excellent flexibility and sealing elasticity even in cryogenic environments of -100℃.

A "Protective Shield" Against High-Energy Radiation: In addition to low-temperature resistance, phenyl silicone rubber also possesses outstanding radiation resistance. Under bombardment by high-energy particles such as cosmic rays or nuclear radiation, the polysiloxane backbone of ordinary silicone rubber is prone to breakage (degradation) or excessive cross-linking, leading to material failure. However, the phenyl group in phenyl silicone rubber can form a stable conjugated structure with radiation-generated free radicals, effectively dispersing and consuming radiation energy, thereby inhibiting molecular chain degradation and maintaining the stability of the material's macroscopic properties.

In summary, through sophisticated molecular modification, phenyl silicone raw rubber possesses both excellent cold resistance and radiation resistance, making it an ideal material for ensuring the safe operation of critical equipment in extreme environments.