High temperature high damping silicone rubber-Iota

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News > Dynamic industry > High temperature high damping silicone rubber

High temperature high damping silicone rubber

High and low temperature resistance of high damping silicone rubber, its characteristics is that it is by the raw materials with the following weight proportions by kneading, mixing, in 3 ~ pressure 14MPa 160 to 180 DEG C to sulfide for 15 minutes, after stripping at a temperature of 200 DEG C and sulfide 4 hours to. First let us know the relevant knowledge of the silicone rubber.
Technical field
This kind of silicon rubber relates to a with high energy absorption vibration and noise suppression, high damping heat curing silicone compound, the silica gel is especially suitable for used as aerospace device damping materials. Background the common technology of silicone rubber generally have excellent resistance to high and low temperature performance, can adapt to the application in some special environment, such as aerospace aircraft, but the shock absorption and noise reduction performance is poor. But usually as a damping materials of organic polymer, polyurethane and poly (vinyl resin, although in a certain temperature range, with excellent damping performance, but the significant disadvantage is temperature range is narrow, generally in - 20 DEG C or 60 DEG C so as to, the damping properties and mechanical strength decreased significantly, in particular, not suitable for used as air device damping materials.
In order to improve the damping performance of silicone rubber, there are a lot of researches both at home and abroad. For example: by the Japanese patent Tegong Zhao 63-218762 disclosed patent invention to PTFE powder incorporation of silicon rubber formula system, the damping factor tan& increase from 0.1 to 0.115 ~ 0.2 between, but the damping performance is still low. Japan's patented 3-281663 in the silicone rubber powder or fluorine rubber powder into the silicone rubber formula, the temperature dependence of the resonance frequency and vibration transmission is significantly reduced, but the low temperature range is only reached -30, lower temperature is not clear. Because of the low temperature resistance of the butyl rubber and fluorine rubber, it is not very good, and the -50 is brittle, so it can be estimated that the modified silicone rubber will deteriorate at low temperature of -50.
Relevant technical staff through effective control of organic polysiloxane materials. 1 price alkyl and one valence unsaturated group content, so as to obtain the invention wide temperature range, damping properties and mechanical strength, are not changed with the temperature and the decline of the silicone rubber, namely the silicone rubber has energy absorbing vibration and noise reduction function of strong, low compression permanent deformation small and in the temperature range of - 50 DEG to 100 DEG C to have high damping properties, high mechanical strength and so on, especially for the preparation of space use of the damper.

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