Several aspects of rubber aging performance and how to identify them

Answer:

Heat: increasing temperature can cause thermal cracking or thermal crosslinking of rubber. But the basic function of heat is activation. Increase oxygen diffusion rate and activate oxidation reaction, so as to accelerate the speed of rubber oxidation reaction, which is a common aging phenomenon - thermal oxidative aging

The chemical activity of ozone and ozone is much higher than that of oxygen, and it is more destructive. It also breaks the molecular chain, but the effect of ozone on rubber varies with the deformation of rubber. As for the deformation of the rubber (mainly unsaturated rubber), and there should be crack force perpendicular to the direction of the so-called "ozone cracking"; effect on the deformation of the rubber, only surface oxide film without cracking.

Oxygen, oxygen free radical chain reaction in rubber with rubber molecules, the molecular chain rupture or excessive crosslinking caused by rubber performance. Oxidation is one of the important reasons for aging of rubber

Rubber and rubber products in the processing, storage and use of the process, due to the comprehensive effect of internal and external factors caused by the physical and chemical properties and mechanical properties of rubber gradually deteriorated, and finally lose value, this kind of change is called aging of rubber