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Advantages and disadvantages of silicone rubber and its temperature resistance performance

🕙 2023-10-05 👆

Silicone rubber refers to rubber whose main chain is composed of alternating silicon and oxygen atoms, with two organic groups usually connected to the silicon atoms. Ordinary silicone rubber is mainly composed of siloxane chains containing methyl groups and a small amount of vinyl groups. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, while the introduction of trifluoropropyl and cyano groups can improve the temperature and oil resistance of silicone rubber. Silicone rubber has good low-temperature resistance and can generally work at -55 ℃. After the introduction of phenyl, it can reach -73 ℃. The heat resistance of silicone rubber is also outstanding, and it can work for a long time at 180 ℃. It can withstand several weeks or more of elasticity even at slightly above 200 ℃, and can instantly withstand high temperatures above 300 ℃. Silicone rubber has good breathability and the oxygen permeability is the highest among synthetic polymers. In addition, silicone rubber also has prominent characteristics of physiological inertness and does not cause coagulation, making it widely used in the medical field.

Advantages and disadvantages of silicone rubber and its temperature resistance performance:

Advantages: Excellent heat resistance, cold resistance, ozone resistance, atmospheric aging resistance, and good insulation. After modulation, the tensile strength is greater than 1500psi and the tear resistance is greater than 88lbs. The elasticity is good and the compressibility is good. It has excellent resistance to neutral solvents, insulation, and heat dissipation. General temperature.

Disadvantages: It is not recommended to use most concentrated solvent oils, concentrated acids, and diluted sodium hydroxide.

Commonly used: household appliance seals, electric kettles, electric irons, microwave ovens, electronics industry: shock absorbers in mobile phone buttons, dvds, seals in cable connectors, formats in contact with people Supplies: water bottles, water dispensers

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