Electronic silicone rubber parts have the characteristics of high and low temperature resistance, maintain stable use flexibility in the temperature range of -70 ° C - +260 ° C, and have the advantages of ozone resistance and weather resistance, and are suitable for sealing gaskets in thermal mechanical equipment. . Because it has no toxic and side effects, it can be used to make thermal insulation materials, insulating industrial products and medical silicone rubber products. It also has a variety of excellent performance indicators such as waterproof, flame retardant, heat resistance, electrical conductivity, wear resistance, acid and alkali resistance, and conforms to the European Union. Eco-friendly grade standard.

1. Thermal oxidation causes aging of electronic silicone rubber parts

Elevating the ambient temperature can cause thermal cracking or thermal crosslinking of silicone rubber products. But the basic function of heat is the activation function. Enhance the oxygen diffusion rate and activate the redox reaction, thereby accelerating the rubber redox reaction rate, which is a common aging phenomenon - thermal oxygen aging.

2. Oxidation causes the aging of electronic silicone rubber parts

Oxygen in silicone rubber produces a free radical chain chemical reaction with rubber molecules, and the molecular structure chain is broken or excessively cross-linked, resulting in changes in the performance indicators of silicone rubber products. Oxidation is one of the important reasons for rubber aging.

3. The cause of light

The shorter the light wave, the greater the energy. What wreaks havoc on electronic silicone rubber fittings is higher-energy UV light. In addition to directly causing the breakage and cross-linking of the molecular structure chain of the rubber, the rubber generates free ion groups due to the absorption of light energy, which causes and accelerates the oxidation chain reaction process. The external light plays a role in heating. Another characteristic of light action (different from heat action) is that it mainly occurs on the surface of rubber. For samples with high glue content, there will be network cracks on both sides, that is, the so-called "optical outer layer cracks".

4. Aging caused by ozone

The chemical active oxygen of ozone is much higher and more destructive. It also breaks the molecular chain, but the effect of ozone on rubber varies with whether the rubber is deformed or not. When used on deformed rubber (mainly unsaturated rubber), cracks that are straight in the direction of stress action, the so-called "ozone cracks"; when used on deformed rubber, only the surface layer forms an oxide film without 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 are very easily damaged when wet and cold air is exposed to rain or soaked in water. Extraction and melting. Caused by root causes such as hydrolysis reactions or absorption. Especially under the replacement action of water immersion and air exposure, the destruction of rubber will be accelerated. However, under certain conditions, moisture does not damage the rubber, so that it has the effect of slowing down aging.