The basic structural units of organic silica products are made up of silicon oxygen links, while the side chains are connected by silicon atoms with other organic groups. Therefore, in the structure of organosilicon products, it contains both organic groups and inorganic structures. This particular composition and molecular structure make it a combination of organic properties and inorganic functions. Compared with other polymer materials, silicone products
The most prominent feature is that:
1. temperature resistance
Silicone product is the silicon oxygen bond (SiO) as the main chain structure of the C-C bond is 82 thousand and 600 kcal / mole, SiO bond card / 121 thousand in mole fraction of silicone, so the thermal stability of silicone products, high temperature (or radiation) molecular bond doesn't break, not decomposition. Silicone is not only resistant to high temperature and low temperature resistance, can be used in a wide temperature range. Both chemical properties and physical and mechanical properties vary little with temperature.
2. weather resistance
The main chain of organosilicon products is Si - O, which has no unique bond, so it is not easy to be decomposed by ultraviolet light and ozone. Organic silicon has better thermal stability, radiation resistance and weather resistance than other polymer materials. Organic silicon has a lifespan of up to several decades in a natural environment.
3. electrical insulation performance
Silicone products have good dielectric properties, dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity and surface resistance coefficient are among the best in the insulating material, and their electrical properties by the influence of temperature and frequency is very small. Therefore, they are stable electrical insulating materials and widely used in the electronics and electrical industries. In addition to its excellent heat resistance, silicone has excellent water repellency, which is a reliable guarantee for the use of electrical equipment in wet conditions.
4. physiological inertia
Polysiloxane is one of the most inactive compounds known. They are highly resistant to biological aging, have no rejection reaction with animals, and have better anticoagulant properties.
5. low surface tension and low surface energy
The main chain of organic silicon is very supple, and its intermolecular force is much weaker than that of hydrocarbon. Therefore, the viscosity of the hydrocarbon is lower than that of the molecular weight hydrocarbon, the surface tension is weak, the surface energy is small, and the film forming ability is strong. This low surface tension and low surface energy are the main reasons for its many applications: hydrophobic, defoaming, foam stabilization, anti sticking, lubrication, glazing and other outstanding properties.