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O-rings are widely used in various mechanical equipment seals. They provide a seal under static or moving conditions at specified temperatures, pressures, and different liquid and gaseous media. They also have high and low temperature resistance. 告诉您在使用橡胶密封圈产品的同时要控制好温度范围，保持良好的密封弹性，以及耐臭氧、耐天候老化等优点。 Haisheng Rubber tells you to control the temperature range, maintain good sealing elasticity, and resistance to ozone, weathering and other advantages when using rubber seals.
标准密封件 。 Secondly, the silicone sealing ring in the rubber sealing ring material has many excellent characteristics such as non-toxic and odorless, waterproof, flame retardant, high temperature resistance, wear resistance and oil resistance. It can be used for making thermal insulation, insulation products and medical silicone products. Pieces . O型橡胶密封圈材质老化的因素有哪些呢? So, what are the factors that cause the aging of the O-ring rubber seal material?
氧在 O型橡胶密封圈材料中同橡胶分子发生游离基链锁反应，分子链发生断裂或过度交联，引起硅橡胶制品性能的改变。 First, the principle of oxidation Oxygen in the O-type rubber seal ring material with the free radical chain reaction of rubber molecules, molecular chains break or excessive cross-linking, causing changes in the properties of silicone rubber products . Oxidation is one of the important reasons for the aging of rubber seals.
对橡胶密封圈材料起破坏作用的是能量较高的紫外线，因为光波越短、能量越大。 Second, the principle of light that has a destructive effect on the rubber seal ring material is ultraviolet energy with higher energy, because the shorter the light wave, the greater the energy. In addition to ultraviolet rays, which can directly cause the breaking and cross-linking of rubber molecular chains, rubber absorbs light energy to generate free radicals, triggering and accelerating the oxidation chain reaction process. Outside light plays a heating role. Another feature of light effect (different from heat effect) is that it mainly grows on the surface of oak. “光外层裂”。 For samples with high gel content, reticular cracks appear on both sides, so-called "light outer layer cracks".
臭氧的化学活性氧高得多，破坏性更大，它同样是使分子链发生断裂，但臭氧对 O型密封圈材料的作用情况随橡胶变形与否而不同。 Third, the role of 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 the O-ring seal material varies with the deformation of the rubber.
提高温度可引起硅 O型橡胶密封圈产品的热裂解或热交联，但热的基本作用还是活化作用。 Fourth, high temperature action Increase the temperature can cause thermal cracking or thermal cross-linking of silicon O-type rubber seal products, but the basic role of heat is still activation. Increasing the rate of oxygen diffusion and activating the oxidation reaction, thereby accelerating the rate of rubber oxidation reaction, is a common aging phenomenon, that is, thermal oxygen aging.
在机械应力反复作用下，会使橡胶密封圈分子链断裂生成游离荃，引发氧化链反应，形成力化学过程。 Fifth, mechanical stress Under the repeated action of mechanical stress, the molecular chain of the rubber seal ring will be broken to generate free radicals, which will cause an oxidation chain reaction and form a force chemical process. Mechanical breaking of molecular chains and mechanically activated oxidation processes. Secondly, it is easy to cause ozone cracking under the action of stress.
水分的作用在于两个方面，一是硅橡胶制品在潮湿空气淋雨或浸泡在水中时，会导致容易破坏，这是由于橡胶中的水溶性物质和清水荃团等成分被水抽提溶解。 Six, the role of moisture The role of moisture lies in two aspects. One is that when silicone rubber products are exposed to wet air or immersed in water, they will be easily damaged. Water extraction dissolves. The second is caused by hydrolysis or absorption, especially under the alternating action of water immersion and atmospheric exposure, which will accelerate the destruction of the rubber seal material.
如化学介质（油液）、变价金属离子、高能辐射、电和生物等也会影响 O型橡胶密封圈材料的老化程度。 Seven, other factors such as chemical media (oil), valence metal ions, high-energy radiation, electricity and biology will also affect the aging degree of O-ring rubber seal material.
If you have more questions, welcome to consult on Haisheng Rubber's official website
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