The basic structural unit of the organosilicone product […]
The basic structural unit of the organosilicone product is composed of silicon-oxygen chain links, and the side chains are connected to various other organic groups through silicon atoms. Therefore, in the structure of the silicone product, both the "organic group" and the "inorganic structure" are contained. This special composition and molecular structure make it combine the properties of the organic matter with the function of the inorganic substance. Compared with other polymer materials, the outstanding performance of silicone products is that silicone products are based on silicon-oxygen bonds, and the bond energy of CC bonds is 。
Si The bond of the -O bond can be 121 kcal/mol in the silicone, so the thermal stability of the silicone product is high, and the chemical bond of the molecule at high temperature or radiation irradiation) does not break or decompose. Silicone is not only resistant to high temperatures, but also resistant to low temperatures and can be used over a wide temperature range. Regardless of chemical properties or physical and mechanical properties, the change in temperature is small.
The main chain of the silicone product is, which has no double bonds and is therefore not easily decomposed by ultraviolet light and ozone. Silicones have better thermal stability and resistance to radiation and weathering than other polymer materials. The service life of silicone in the natural environment can reach several decades. Silicone products have good electrical insulation properties, and their dielectric loss, withstand voltage, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best in insulating materials, and their electrical properties are affected by temperature and frequency. The impact is small. Therefore, they are a stable electrical insulating material and are widely used in the electronics and electrical industries. In addition to excellent heat resistance, silicone has excellent water repellency, which is a guarantee of high reliability in the use of electrical equipment under wet conditions.
Silicone compounds are one of the less active compounds known. They are very resistant to biological aging, have no rejection reaction with animals, and have good anticoagulant properties. The main chain of silicone is very compliant, and its intermolecular force is much weaker than that of hydrocarbons. Therefore, it is lower in viscosity than hydrocarbons of the same molecular weight, has weak surface tension, small surface energy, and strong film forming ability. This low surface tension and low surface energy are the main reasons for its multi-faceted application: hydrophobic, defoaming, foam stabilization, anti-sticking, lubrication, glazing and other excellent properties.