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RUBBER GRADE Of CPE Aging Seven Factors

Edit:Weifang Yaxing Chemical Co.,Ltd   Date:Aug 02, 2017

RUBBER GRADE of CPE aging seven factors
    One, oxygen
    A) Oxygen: Oxygen in the RUBBER GRADE of CPE with the RUBBER GRADE of CPE molecules free radical chain reaction, molecular chain fracture or excessive cross-linking, causing RUBBER GRADE of CPE performance changes. Oxidation is one of the important reasons for the aging of the RUBBER GRADE of CPE.
    Second, ozone
    B) Ozone: Ozone chemical activity is much higher than oxygen, more destructive, it is also the molecular chain fracture, but the role of ozone on the RUBBER GRADE of CPE with the RUBBER GRADE of CPE deformation or not different. When used as a deformed RUBBER GRADE of CPE (mainly unsaturated RUBBER GRADE of CPE), there is a crack in the direction of the stress acting, that is, the so-called "ozone cracking"; when the deformation of the RUBBER GRADE of CPE, only the surface of the oxide film Without cracking.
    Three, hot
    C) Heat: Raising the temperature can cause thermal cracking or thermal crosslinking of the RUBBER GRADE of CPE. But the basic role of heat or activation. Improve the oxygen diffusion rate and activation of oxidation reaction, thereby accelerating the RUBBER GRADE of CPE oxidation reaction rate, which is a common phenomenon of aging - thermal oxygen aging.
    Four light
    D) light: the shorter the light, the greater the energy. The damage to the RUBBER GRADE of CPE is the high energy of the UV. In addition to UV can directly lead to RUBBER GRADE of CPE molecular chain fracture and cross-linking, the RUBBER GRADE of CPE due to the absorption of light energy and free radicals, trigger and accelerate the oxidation chain reaction process. The outside light plays the role of heating. Another feature of its role in light (unlike heat) is that it is mainly in the rubber surface. High hardness of the sample, both sides will appear reticular cracks, the so-called "light outer crack."
    Fifth, mechanical stress
    E) Mechanical stress: Under the repeated action of mechanical stress, the RUBBER GRADE of CPE molecular chain is broken to produce free Tsuen, which initiates the oxidation chain reaction and forms the force chemical process. Mechanical fracture molecular chain and mechanical activation oxidation process. How can a dominant, depending on the conditions in which it depends. In addition, under the action of stress easily lead to ozone cracking.
    Six, moisture
    F) Moisture: The role of water in two ways: RUBBER GRADE of CPE in the humid air rain or soak in water, easy to damage, it is due to RUBBER GRADE of CPE water-soluble substances and hydrophilic groups and other ingredients by water Extraction, hydrolysis or absorption and other causes. Especially in the water immersion and atmospheric exposure of the alternating effect, will accelerate the damage of the RUBBER GRADE of CPE. But in some cases the water on the RUBBER GRADE of CPE can not afford to damage, and even delay the role of aging.
    Seven, oil
    G) RUBBER GRADE of CPE products in the use of long-term contact with the oil medium, oil can penetrate into the CPE rubber level to make it swell, resulting in RUBBER GRADE of CPE strength and other mechanical properties. Oil can make the RUBBER GRADE of CPE swell, because the oil infiltration RUBBER GRADE of CPE, resulting in the proliferation of molecules, so that the network structure of vulcanized rubber changes.