Molecular structure: A fusion of an inorganic backbone and organic side chains
Silicone rubber is a linear polymer with a silicon-oxygen bond (-Si-O-Si-) as the backbone and monovalent organic groups (such as methyl, vinyl, and phenyl) as side chains. This structure combines the heat resistance of inorganic polymers with the flexibility of organic polymers: the Si-O bond energy is as high as 370 kJ/mol, far exceeding the C-C bond (240 kJ/mol), giving it excellent thermal stability. The organic side chains inhibit crystallization through steric hindrance, ensuring that the material retains its elasticity even at low temperatures. Based on the vulcanization temperature, silicone rubber can be divided into high-temperature vulcanized silicone rubber (molecular weight 400,000-800,000) and room-temperature vulcanized silicone rubber (molecular weight 10,000-50,000). The former is a solid gel, while the latter is a viscous liquid.

Core Performance: Wide Temperature Range and Adaptability for Multiple Scenarios
Extreme Temperature Tolerance: Operating temperature range extends from -100°C to 300°C. Phenyl silicone rubber maintains elasticity even at -110°C, while fluorosilicone rubber can withstand temperatures up to 300°C, far exceeding the -50°C to 150°C range of traditional rubber.
Environmental Stability: Resistant to ozone aging and UV radiation, it withstands long-term outdoor use without cracking. Its highly hydrophobic surface, with a water absorption rate of less than 0.01%, makes it suitable for humid environments.
Electrical Insulation: With a volume resistivity of 1×10¹⁶ Ω·cm and a dielectric loss tangent of less than 0.001, it is an ideal insulation material for wires, cables, and electronic components.
Biocompatibility: Non-toxic and odorless, it exhibits excellent compatibility with human tissue. It has passed FDA and LFGB certifications and is widely used in medical devices and implants.

Applications: From cutting-edge technology to everyday life
Aerospace: As an aircraft cabin sealant, it can withstand temperatures ranging from -60°C to 200°C; used in rocket fuel systems, it withstands extreme pressure and chemical corrosion.
New Energy: As an encapsulation material in photovoltaic modules, it boasts a light transmittance of 99.2% and a UV-resistant lifespan exceeding 25 years; and as a thermal interface material in lithium batteries, it ensures thermal balance within the battery cells.
Healthcare: As an artificial breast, facial plastic surgery filler, and sustained-release drug delivery vehicle, its biostability reduces the risk of secondary surgeries.
Consumer Electronics: In mobile phone waterproof rings, keyboard buttons, and wearable device straps, its low compression set ensures long-term sealing.

From aviation seals to baby pacifiers, silicone rubber, with its unique "inorganic backbone + organic side chains" structure, has become an indispensable "versatile material" in modern industry, continuously pushing the boundaries between high-end manufacturing and consumer technology.