2. Advantages of organosilicon polymers

（1）Temperature resistance
General polymer materials are mostly based on carbon-carbon (C-C) bonds as the main chain structure, such as plastics, rubber, chemical fibers, etc., while organosilicon products are based on silicon-oxygen (Si-O) bonds as the main chain structure. The bond energy of C-C bonds is 82.6 kcal/g molecule, and the bond energy of Si-O bonds in organosilicon is 121 kcal/g molecule. Therefore, organosilicon products have high thermal stability, and the chemical bonds of molecules do not break or decompose under high temperatures (or radiation). Organosilicon is not only resistant to high temperatures, but also to low temperatures, and can be used in a wide temperature range. Whether it is chemical properties or physical and mechanical properties, the changes with temperature are very small, which is also related to the flexible helical structure of organosilicon molecules.

（2）Weather resistance
The main chain of silicone products is -Si-O-, without double bonds, so it is not easily decomposed by ultraviolet light and ozone. In silicone products, the chain length of Si-O bonds is about one and a half times the chain length of C-C bonds. The longer chain length makes silicone have better thermal stability, radiation resistance and weather resistance than other polymer materials. The service life of silicone in natural environment can reach several decades.