Why should antioxidants be added to the manufacture of plastic tarpaulins?

Plastic tarpaulins will be added with processing aids such as antioxidants during the production process. Why is this? First, the stability of the polymer compound using the pre-antioxidant. Preventive or antioxidants can decompose hydroperoxides without the formation of free radical intermediates, thus preventing the decomposition of hydroperoxides into free radical induced chain branching. Second, the stability of polymers using chain scission antioxidants: the reaction mechanism of chain reaction active species of antioxidants, that is, segment chain donor mechanism and segment chain acceptor mechanism, the mechanisms are typically peroxide radicals and phenol The free radicals generated by the inhibitor AH can destroy a peroxide-based PO2. Moreover, it has a synergistic effect with antioxidants. Well-known examples are biscinnamoyl thiodipropionate or bisstearoyl thiodipropionate and sterically hindered phenols, which are used in the thermal stability of some polymer compounds. Another important example of synergy is the complexation of sterically hindered phenols and phosphites in improving the melt stability of polyolefins.

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