Oxygen: oxygen with rubber in rubber molecule a free radical chain reaction, rupture or excessive cross-linking molecular chain, causing rubber properties change. Oxidation is one of the important reason for rubber.
Water: water has two aspects: the rubber in the humid air in the rain or when soaked in water, easy to destroy, which is water soluble in rubber material and removal of water extraction in Shui Quan and other ingredients are dissolved. Hydrolyzed or absorption causes. Especially in the water and under the effect of alternating atmosphere exposure, will accelerate the destruction of the rubber. However, in some cases water on the rubber is not destructive, even delaying the effects of aging.
Ozone: ozone is chemically active oxygen is much higher, more damage, it also is to make the chain breaks, but the effect of ozone on rubber deformation of rubber or not is different. As for deformation of rubber (primarily unsaturated rubbers), direction and stress cracks appear, the so-called "ozone cracking"; when acting on the deformation of the rubber, only surface oxide film without cracking.
Heat: temperature can be caused by thermal cracking or thermal Crosslinking of rubber. But the heat's basic role is activation. Enhance oxygen diffusion oxidation reaction rate and activation, so as to accelerate the rate of oxidation of rubber, which is a universal aging--aging.
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