Ethyl silicone rubber is a special type of silicone rubber material, chemically known as polydimethyldiethylsiloxane. It is prepared through the co-hydrolysis reaction of dimethyldichlorosilane and diethyldichlorosilane in the presence of concentrated sulfuric acid, followed by separation and polymerization. Alternatively, it can also be synthesized through the copolymerization of D4 (a siloxane monomer) and hexaethylcyclotrisiloxane under the action of a catalyst.

The outstanding property of ethyl silicone rubber is its excellent cold resistance. The introduction of ethyl groups disrupts the crystalline properties of silicone rubber, significantly lowering the minimum glass transition temperature of ethyl silicone rubber. Some products can even reach -147°C, making it one of the silicone rubbers with the best low-temperature resistance. This characteristic makes ethyl silicone rubber a fundamental material for rubber products in cryogenic equipment, high-latitude and high-altitude cold regions, aviation, aerospace, deep-sea exploration, and other low-temperature fields.

In addition, ethyl silicone rubber has constant elastic modulus and constant damping factor, making it a key raw material for damping and vibration reduction in precision electronic equipment. At the same time, the operating temperature range of ethyl silicone rubber is relatively wide, typically from -70°C to 200°C, which further broadens its application fields.

However, it is worth noting that ethyl groups have greater reactivity than methyl groups. Therefore, as the ethyl content increases, the heat resistance of ethyl silicone rubber may decrease. Therefore, in practical applications, it is necessary to select an appropriate ethyl content based on the specific usage environment and requirements.

Overall, ethyl silicone rubber is highly regarded for its excellent cold resistance and wide range of applications, making it an important member of silicone rubber materials. With advancements in technology and the continuous expansion of application fields, the performance and applications of ethyl silicone rubber are expected to be further enhanced and expanded.

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