Silicone is a synthetic, structural silicon and oxygen atoms as the main chain of a polymer . Because of the strong chemical bonding of the silicon-oxygen structure that constitutes the main chain, the molecules of organosilicon polymers are much more stable to heat and oxygen than ordinary organic polymers.
Silicone is made into a variety of adhesive sealants, potting adhesives, insulating coatings and silicone grease and other finished products used in a variety of electronic devices.
It is not only as aviation, cutting-edge technology, military technology sector of the use of special materials, but also used in various sectors of the national economy, the scope of its application has been expanded to: construction, electrical and electronic, textile, automotive, machinery, leather and paper, chemical industry, light industry, metal and paint, medicine and health care.
Characteristics of silicone
1, temperature characteristics
Silicone products are silicone-oxygen (Si-O) bond is the main chain structure of the C-C bond bond energy of 82.6 kcal / g molecules, Si-O bond energy in silicone is 12.6 kcal / g molecules. C-C bond bond energy of 82.6 kcal / g molecules, Si-O bond energy in silicone is 121 kcal / g molecules, so the thermal stability of silicone products is high, high temperature (or radiation irradiation) molecules of the chemical bond does not break, do not decompose. Organic silicon can not only high temperature resistance, but also low temperature resistance, can be used in a wide temperature range.
2, weathering
Silicone products, the main chain of -Si-O-, no double bond exists, so it is not easy to be decomposed by ultraviolet light and ozone. Silicone has a better thermal stability than other polymer materials, as well as irradiation and weather resistance. The service life of silicone in the natural environment can be up to several decades.
3, electrical insulation
Silicone products have good electrical insulation properties, its dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistance coefficient and surface resistance coefficient, etc., are among the best in insulating materials, and their electrical properties by the temperature and frequency is very small. Therefore, they are a stable electrical insulating material.