The characteristics of the silicone rubber and USES

by:Cupidove     2020-05-02

the characteristics of silicon rubber and USES description

by Si - silicone polymer molecule O ( Silicon - Oxygen) Key chain structure, its main composition is high molecular weight linear polysiloxane. Because of the Si - O- Si key is the basic key type, main connection methyl silicon atoms, the introduction of very small amounts of unsaturated side chain groups and small molecular inter-atomic forces, molecular spiraling structure, methyl outwards is arranged and can rotate freely, making silicone products rubber than other ordinary rubber has better heat resistance, electrical insulation, chemical stability, etc. A typical silicone rubber poly formaldehyde siloxane, namely have a helical molecular configurations, the intermolecular force is small, so have good resilience, at the same time pointing to the outside of the spiral formaldehyde can rotate freely, thus makes the surface of the silicone rubber has a unique performance, such as hydrophobic and surface viscosity. The following table lists the main characteristics of silicone rubber and USES.

: heat resistance silicone rubber is much better than the ordinary heat resistance, can be used in almost always 150 degrees and no performance change; Can be used for 10000 hours at 200 degrees; At 350 degrees can also be used for a period of time. Widely used in heat required: thermos bottle seal pressure cooker coil heat resistant handle.

cold resistance: - for the general rubber was delayed 20 f ~ - 30 degrees, in - the number of silicone rubber 60 degrees ~ - 70 degrees still has good elasticity, some special formulation of silicon rubber can also withstand low temperatures. The low temperature sealing ring.

hou resistance: ordinary rubber ozone generated by corona discharge under the action of rapid degradation, and silicone rubber is not affected by ozone. And for a long time under the condition of ultraviolet radiation and other climate, and only a small change of its physical properties. Sealing material of outdoor use.

performance: silicone rubber has the very high resistivity and in wide temperature and frequency range of the resistance remains stable. rubber for high voltage corona discharge and arc discharge at the same time has the very good resistance. High voltage insulator high pressure cap electrical parts other TV.

conductivity: when join the conductive filler ( Such as carbon black) , silicone rubber has the keyboard conductive contact point.


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