Phenyl raw rubber (phenyl silicone rubber) exhibits superior performance and broad application prospects in the field of damping materials. Its unique molecular structure endows it with excellent wide-temperature-range damping characteristics, making it an indispensable vibration reduction and noise reduction material in high-end fields such as aerospace, automotive industry, and electronics.

I. Core Characteristics of Phenyl Raw Rubber Damping Materials
Wide-Temperature-Range Damping Performance
Phenyl silicone rubber can maintain its elasticity under extreme temperature conditions (from -100℃ to +70℃), a characteristic far superior to many traditional rubber materials.

The effective damping temperature range widens and shifts towards higher temperatures with increasing phenyl content. The damping silicone rubber prepared by adding 50 parts of silica to 40 mol% phenyl raw rubber exhibits the best overall performance, with a tensile strength of up to 7.0 MPa, an elongation at break of 376%, a tan δ max of 0.7, and an effective damping temperature range of up to 113℃.

By changing the filler type, 40 mol% phenyl silicone rubber with the addition of carbon black K90 and graphene sheets achieved tan δ max values of 1.2 and 0.7, respectively, and broadened the effective damping temperature range to 127℃ (-27℃ to 100℃) and 133℃ (-33℃ to 100℃), respectively.

High Damping Efficiency: Phenyl silicone rubber can absorb up to 70% of vibration energy, significantly reducing equipment operating noise. For example, it reduced refrigerator operating noise from 48 dB to 34 dB, successfully passing the international "deep-sea level quietness" certification.

Its damping performance is expressed by the loss factor tan δ. The tan δ max of phenyl silicone rubber is between 0.5 and 0.8, significantly higher than that of ordinary silicone rubber.

Temperature Adaptability: Low-phenyl silicone rubber (5-10% phenyl content) retains flexibility at -100℃, and its curing temperature drops to -115℃, making it particularly suitable for extremely cold environment applications.

High-phenyl silicone rubber (30-50% phenyl content) exhibits excellent performance in high-temperature environments, with a high-temperature resistance exceeding 250℃.

II. Influence of Different Phenyl Contents on Damping Performance
Low-phenyl silicone rubber (5-15% phenyl content) possesses the best low-temperature resistance, with glass transition temperatures (Tg) of -105℃ and -85℃, and compressive cold resistance coefficients of 0.49 and 0.461 at -70℃, respectively.

Its tensile cold resistance coefficient reaches 0.94 at -71℃, and its shear modulus fluctuates little over a wide temperature range, making it particularly suitable for applications requiring stable damping performance in extremely low-temperature environments.

Medium-phenyl silicone rubber (15-25% phenyl content) combines good high-temperature resistance and flame retardancy, and is self-extinguishing upon ignition.

It exhibits greater variation in shear modulus, making it suitable for applications requiring stable damping over a moderate temperature range.

High-phenyl silicone rubber (30-50% phenyl content) possesses excellent radiation resistance, withstanding 2.58 × 10⁴ C/kg gamma-ray radiation.

Its high-temperature resistance is significantly improved, maintaining good damping characteristics even in environments above 250℃, although its low-temperature performance decreases somewhat.

III. Main Application Areas of Phenyl Raw Rubber Damping Materials
Aerospace Industry: Space-grade low-phenyl silicone rubber is used for sealing hatches, windows, etc., serving as the lifeline of space stations. It has been successfully applied to spacecraft such as "Tiangong" and "Shenzhou," with over 5,000 sealing products produced to date.

It is used for absorbing vibration energy during rocket launches, reducing damage to precision instruments inside spacecraft and ensuring the structural integrity and normal operation of equipment during launch.

Automotive Industry: Engine seals, high-temperature pipe connections, exhaust system components, etc., effectively improving the durability and safety performance of automobiles.

A key damping material in high-speed rail vibration reduction systems, providing a smooth and comfortable riding experience.
Electronics and Electrical Appliances Industry: A preferred material for electronic component packaging, circuit board protection, and cable joint sealing, its excellent damping properties effectively reduce vibration and noise during electronic equipment operation.

Electromagnetic shielding/absorbing materials for mobile phones, laptops, and other electronic devices, solving electromagnetic radiation and interference problems associated with high-frequency, high-power electronic products.

Building and Infrastructure: Vibration damping systems in bridges, tunnels, and high-rise buildings, improving seismic performance and safety.

Building sound insulation materials, utilizing their excellent damping properties to reduce interior noise.

Military and Special Equipment: Used in the development of foam vibration damping pads for strategic weapons, inertial navigation vibration dampers, and rotor dampers, with a cumulative supply exceeding 1000 kg.

Key damping material in the hydraulic systems of military aircraft, ensuring reliable operation in extreme environments.