What are the rubber activity? What are the performance on the surface?

The factors that cause rubber aging are:

A)  oxygen: oxygen in the rubber with the rubber molecules free radical  chain reaction, molecular chain fracture or excessive cross-linking,  causing changes in rubber properties. Oxidation is one of the important reasons for the aging of rubber.

B)  Ozone: Ozone is much higher and more destructive, it is also the  molecular chain fracture, but the role of ozone on the rubber with the  rubber deformation or not different. When used as a deformed rubber (mainly unsaturated rubber), there is a  crack in the direction of the stress, the so-called "ozone cracking";  when the rubber is deformed, only the oxide film is formed on the  surface without cracking.

C) Heat: Raising the temperature can cause thermal cracking or thermal crosslinking of the rubber. But the basic role of heat or activation. Increase the rate of oxygen diffusion and activation of oxidation,  thereby accelerating the rate of oxidation of rubber, which is a common  phenomenon of aging - thermal oxygen aging.

D) light: the shorter the light, the greater the energy. The rubber is the destruction of the role of high energy UV. In  addition to UV can directly lead to the rubber molecular chain of the  fracture and cross-linking, the rubber due to the absorption of light  energy generated free radicals, trigger and accelerate the oxidation  chain reaction process. The light from the outside play 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."

E)  mechanical stress: repeated mechanical stress, the rubber molecular  chain will break the formation of free Tsuen, lead to oxidation chain  reaction, the formation of 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.

F)  Moisture: There are two aspects of water: the rubber in the humid air  rain or soak in the water, easy to damage, this is due to the rubber in  the water-soluble substances and water Tsuen and other ingredients are  dissolved by water. Hydrolysis or absorption caused by other reasons. Especially  in the water immersion and atmospheric exposure of the alternating  effect, will accelerate the destruction of rubber. But in some cases the moisture on the rubber can not afford to damage, and even delay the role of aging.

G) Other: the role of the rubber there are chemical medium, variable  metal ions, high-energy radiation, electricity and biological.
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Quanzhou Tesla Polymer Technology Co., Ltd