The main reasons for the aging of electronic silicone rubber parts

Electronic silicone rubber parts with high and low temperature resistance characteristics, in the -70 ℃ - +260 ℃ temperature range to maintain stable use of elasticity, and ozone resistance, weather aging and other advantages, suitable for thermal mechanical equipment in the sealing gasket. Because there is no still any toxic side effects can be made insulation materials, insulation industrial products and medical silicone rubber products, while having waterproof, flame retardant, heat-resistant, conductive, wear-resistant, acid and alkali resistance and a variety of excellent performance indicators, in line with the EU ecological and environmental protection level standards.
1、Thermal oxidation causes the aging of electronic silicone rubber parts
Raising the ambient temperature can cause thermal cracking or thermal crosslinking of silicone rubber products. But the basic function of heat is still the activation function. Enhance the rate of oxygen diffusion and activation of redox reaction, and then accelerate the rate of redox reaction of rubber, which is a prevalent aging phenomenon - thermal oxygen aging.
2, oxidation caused by the aging of electronic silicone rubber parts
Oxygen in silicone rubber with rubber molecules produce free base chain lock chemical reaction, the molecular structure chain breakage or excessive cross-linking, resulting in changes in performance indicators of silicone rubber products. Oxidation is one of the important reasons for the aging of rubber.
3、The reason of light
The shorter the light wave, the greater the energy. The electronic silicone rubber parts play a serious destructive role is the higher energy of ultraviolet light. In addition to UV light can directly cause the breakage and cross-linking of the rubber molecular structure chain, rubber due to the absorption of light energy and produce free ion group, cause and accelerate the oxidation chain reaction process. Through the external light plays a heating role. Another characteristic of light action (different from heat action) is that it is mainly generated on the surface of rubber. Specimens with a high rate of glue, both sides will appear mesh cracks, that is, the so-called "light outer layer crack.
4、Ozone caused by aging
The chemical activity of ozone oxygen is much higher and more destructive, it also makes the molecular chain break, but the effect of ozone on rubber varies with the deformation of rubber or not. When used in the deformation of rubber (mainly unsaturated rubber), there is a straight crack with the direction of the stress, the so-called "ozone cracking"; the role of deformation of rubber, only the surface layer of the oxide film and not cracking.
5, moisture is also one of the reasons for the aging of electronic silicone rubber parts
The role of moisture has two aspects: electronic silicone rubber parts in the wet and cold air rain or wet in the water, very vulnerable to damage, it is because the silicone rubber in the water-soluble chemicals and cold water and other active ingredients such as the melting of the water extraction. Hydrolysis reaction or absorption and other underlying causes. Especially the alternating effect of water immersion and air exposure will accelerate the destruction of rubber. However, under certain conditions, water does not have a destructive function on the rubber, so that it has a slowing effect on aging.