What is the role of magnesium oxide and zinc oxide in rubber?

Magnesium oxide and zinc oxide in the rubber is mainly to play a liquidity and antioxidant capacity, increase the tensile strength of rubber and impact resistance. Second, the reaction of zinc oxide as an active agent with an organic accelerator, stearic acid, sulfur and the like occurs during the vulcanization process on the surface of the zinc oxide particles. Due to the strong affinity of zinc oxide to the electrons, the ability to adsorb the accelerator is strong, and the zinc salt of the accelerator-soluble accelerator is formed under the action of stearic acid to improve its solubility and form an amine or fatty acid Zinc complexes that make the accelerator more lively. Sulfur added to the complex, through the induction of activation to form a strong curing agent. During this process, the surface of the zinc oxide particles is constantly reacting, the particle size is decreasing, and the zinc oxide is consumed until the compound is sufficiently vulcanized.