The materials properties of silicone rubber _ silicone rubber electrical insulating performance in-depth study
electrical insulating properties of the silicone rubber material properties
silicone rubber ( 硅橡胶) As a molecular key nature of both inorganic and organic polymer elastic material, its molecular primary key is composed of alternating silicon atoms and oxygen atoms ( - Si- O- Si- ) 。 Silica can key in the key of 370 kj/mol, ultraviolet irradiation energy than high, than the average rubber C - C combined with key to 240 kj/mol, far more, in the high temperature ( Or radiation exposure) The molecular bonds do not broken, do not break down. Can be in - 90 ~ + 300 ℃ temperature range use for a long time, still do not lose the original strength and elasticity.
after silicone rubber vulcanization molding, main chain and side chain were not active group, the silicone rubber have excellent chemical stability, acid and alkali will not affect its molecular structure.
and chemical properties and physical mechanical properties, along with the change of temperature are small.
silicone rubber has good electrical insulating properties, the dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity and surface resistivity of all came out on top in the insulation material, and their electrical performance is affected by temperature and frequency is small. Its regular performance parameters are as follows:
silicone rubber good water-repellent property in 24 ~ 48 hours on the filth of the migration to the surface, make the dirty surface with hydrophobic. So the silicone rubber has a very high resistance to pollution flashover, rain ability.
so, silicone rubber has been gradually replaced by other composite insulating materials are widely used in high-voltage lines and substations.
can run in the power system in a large number of silicone rubber products, mainly due to its excellent hydrophobic and hydrophobic mobility and pollution flashover resistance ability. Current products on the market, basically has the following three categories:
the basic properties of the three kinds of silicone rubber, see the table below:
the above on the silicone rubber electrical insulating properties is related to sort out, I hope you have a deeper understanding of the performance of silicone rubber electrical insulating, choose silicone products manufacturer in shenzhen, shenzhen area can consider 10 old rubber products factory factory professional and more efficient.
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