The anti-aging effect of carbon black means that carbon black can delay the aging phenomenon of rubber caused by light, heat, oxygen, ozone and other factors during use, so that it can maintain good physical properties and appearance. The anti-aging effect of carbon black mainly depends on the following factors:
Light absorption of carbon black:
Light absorption refers to the ability of carbon black to absorb light, which reflects the protective effect of carbon black on photoaging. Generally speaking, the stronger the light absorption, the stronger the carbon black's ability to absorb light, thereby reducing the breakage and crosslinking of rubber molecular chains caused by light, and improving the anti-light aging effect of rubber.
Oxygen absorption of carbon black:
Oxygen absorption refers to the ability of carbon black to absorb oxygen and ozone, which reflects the protective effect of carbon black on oxygen aging and ozone aging. Generally speaking, the stronger the oxygen absorption, the stronger the carbon black's ability to absorb oxygen and ozone, thereby reducing the breakage and crosslinking of rubber molecular chains caused by oxygen and ozone, and improving the rubber's anti-oxidative aging and anti-ozone aging effect.
Carbon black surface activity:
Surface activity refers to the polar groups or functional groups contained on the surface of carbon black, which reflects the interaction between carbon black and rubber molecules. Generally speaking, the higher the surface activity, the more polar groups or functional groups on the surface of carbon black, which increases the chemical or physical bonds between carbon black and rubber molecules, and improves the interfacial adhesion between rubber and carbon black. Focus on reducing the migration or breakage of rubber molecular chains under stress, and improve the anti-dynamic aging effect of rubber.