What are the factors that affect the aging of rubber adhesives?
Increase in temperature can cause heat): pyrolysis of rubber adhesive or heat crosslinking. But the basic role of heat or activation. Improve the diffusion rate of oxygen activation and oxidation reaction, thus speeding up the rubber oxidation reaction speed, which is a widespread phenomenon of hot oxygen aging aging.4) light: light is shorter, the greater the energy. The destructive effects of rubber adhesive is high energy ultraviolet light can directly cause fracture and cross-linking of rubber chain, rubber adhesive due to absorption of light which is produced by free radicals, and accelerate the oxidation chain reaction process. Ultraviolet light plays a heating the effect of light. Another feature (with different thermal effect) which is in the rubber surface into. The gum content of high sample, both sides will appear net cracks, the so-called outer light split.
5) mechanical stress in mechanical stress under the repeated action, will make the rubber chain fracture generation of free radicals, causing oxidative chain reaction, the formation of chemical process. The mechanical fracture of the molecular chain and mechanical activation. The oxidation process which can be dominant, depending on the conditions. In addition, the effect of stress easy to cause ozone cracking.6) water: water function has two aspects: rubber adhesive in the moist air or rain soaked in water, easy to damage, this is because the rubber in water soluble substances and water groups by water extraction components dissolved. By hydrolysis or absorption of reasons. Especially the effect of alternative soaking and atmospheric exposure in the water, will accelerate the rubber adhesive damage. But the moisture of rubber is not destructive in some situations, and even delay the aging effect.7) other: rubber adhesive effect factors and chemical medium, valence metal ion, high-energy radiation, electrical and biological fields.
