What is silicone?

Reading Volume：【 4270 】

Time：【 2019-01-05 】

Most people only understand some information about silicone on the surface, only know that silicone is a better resin in adhesives! The detailed information is explained below for you: Organosilicon compounds are compounds that contain Si-C bonds and at least one organic group is directly connected to the silicon atom. It is customary to use oxygen, sulfur, nitrogen, etc. to make organic groups. Compounds connected to silicon atoms are also regarded as organosilicon compounds. Among them, polysiloxanes composed of silicon-oxygen bonds (-Si-0-Si-) as the skeleton are the most numerous, the most studied and the most widely used type among organosilicon compounds, accounting for more than 90% of the total amount. .
Silicone materials have a common structure: enough methyl groups on Si atoms shield the high-energy polysiloxane main chain; CH has no polarity, which makes the interaction between molecules very weak; Si-O bond length is longer, Si -O-Si bond has a large bond angle; Si-O bond is a covalent bond with 50% ionic bond characteristics (covalent bond has directionality, ionic bond has no directionality).
Due to the common structure of silicone, it combines the properties of inorganic materials and organic materials. It has the basic properties of low surface tension, low viscosity-temperature coefficient, high compressibility, gas permeability, and high and low temperature resistance, electrical insulation, and oxidation resistance. Excellent properties such as resistance, weather resistance, flame retardancy, water repellency, corrosion resistance, non-toxic and tasteless, and physiological laziness, are widely used in aerospace, electronic and electrical, construction, transportation, chemical, textile, food, light industry, medical and other occupations Among them, silicone is mainly used for sealing, bonding, smoothing, coating, surface activity, demoulding, defoaming, foam suppression, waterproof, moisture-proof, lazy filling, etc. With the continuous growth of the number and types of silicones, the fields of use continue to expand, forming a unique and important product system in the new chemical industry. Many types are irreplaceable and indispensable for other chemicals.

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