In addition, it is easy to cause ozone cracking under stress. Which one can prevail depends on the conditions in which it is located. Mechanically broken molecular chains and mechanically activated oxidation processes. (5) Mechanical stress: Under the repeated action of mechanical stress, the rubber tube molecular chain will be broken to form a free radical, which will initiate the oxidative chain reaction and form a force chemical process. For samples with high gel content, there will be reticular cracks on both sides, the so-called “outer layer cracking”. Another feature of light action (unlike heat) is that it mainly occurs on the surface of the oak. Ultraviolet light plays a role in heating. In addition to ultraviolet rays directly causing the breakage and cross-linking of rubber molecular chains, rubber generates free radicals by absorbing light energy, which initiates and accelerates the oxidation chain reaction process. What is damaging to rubber is the higher energy of ultraviolet light. (4) Light: The shorter the light wave, the greater the energy. Increasing the rate of oxygen diffusion and activating the oxidation reaction to accelerate the oxidation reaction rate of the rubber is a ubiquitous phenomenon of aging – thermal aging.
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But the basic role of heat is activation. (3) Heat: Increasing the temperature may cause thermal cracking or thermal crosslinking of the rubber. When it is used as a rubber for deformation (mainly unsaturated rubber), a crack perpendicular to the direction of stress action occurs, that is, “ozone cracking” when it acts on a deformed rubber, only an oxide film is formed on the surface without cracking. It also breaks the molecular chain, but the effect of ozone on rubber varies with the deformation of rubber. (2) Ozone: The chemical activity of ozone is much higher than that of oxygen, and it is destructive. Oxidation is one of the important reasons for rubber aging.
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(1) Oxygen: Oxygen undergoes a radical chain-locking reaction with rubber molecules in a rubber tube, and the molecular chain is broken or excessively crosslinked, causing a change in rubber properties. Rubber tubes will gradually appear aging during daily use, so what are the factors that cause the rubber tube to age? As a professional rubber manufacturer