The basic structural units of silicone products are made up of silicon-oxygen chain joints, and side chains are connected to various organic groups through silicon atoms. Therefore, in the silicone product structure contains both "organic groups", but also contains "inorganic structure", this special composition and molecular structure so that it sets the characteristics of organic matter and inorganic function in a body. Compared with other polymeric materials, the most outstanding properties of silicone products are:
1. Temperature resistance characteristics
Silicone products are based on the silicon-oxygen (SI) bond structure of the main chain, the key of the C key can be 82.6 kcal/gram molecule, the key of the SI bond can be 121,000 card/gram molecule in the silicone, so the thermal stability of silicone product is high, the chemical bond of molecule of high temperature (or radiation irradiation) does not break or decompose. Silicone is not only resistant to high temperature, but also low temperature, can be used in a wide range of temperature. Whether chemical or physical mechanical properties, with temperature changes are very small.
2. Weather resistance
Silicone products are the main chain of-si-o-, the existence of a unique key, it is not easy to be ultraviolet light and ozone decomposition. Silicone has better thermal stability and resistance to irradiation and weathering than other polymeric materials. The life of organic silicon in the natural environment can be up to dozens of years.
3. Electrical Insulating Properties
Silicone products have good electrical insulation properties, its dielectric loss, voltage resistance, arc resistance, corona Resistance, volume resistivity and surface resistance coefficient are among the best in the insulating materials, and their electrical performance by temperature and frequency of small impact. Therefore, they are a kind of stable electrical insulating material, which is widely used in electronics and electrical industry. In addition to the excellent heat resistance of silicone, but also has excellent water resistance, which is the electrical equipment in the wet condition of the use of high reliability protection.
4. Physical inertia
Polysiloxane compounds are one of the most active compounds known to be inactive. They are very resistant to biological aging, with no rejection of animal body, and have good anticoagulant properties.
5. Low surface tension and low surface energy
The main chain of silicone is very supple, its intermolecular force is much weaker than hydrocarbon, therefore, the hydrocarbon viscosity is lower than the same molecular weight, the surface tension is weak, the surface energy is small, the film-forming ability is strong. This low surface tension and low surface energy is the main reason for its use in many aspects: hydrophobic, defoaming, foam stability, adhesion, lubrication, glazing and other excellent performance.
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