Three reasons for adding antioxidants to plastic tarpaulins

Nowadays, when many people buy plastic tarpaulins, they will go to the wholesale of plastic tarpaulins, and these wholesale plastic tarpaulins will add some processing aids, such as antioxidants, during the production process. There are three main reasons for this: (1) Stability of polymers using chain scission antioxidants: Antioxidants interfere with the reaction mechanism of chain reaction active species, that is, segment chain donor mechanism (CB-D) and segmented chain acceptor mechanism (CB-A) CB-D mechanism is typical of the reaction between peroxide radicals and inhibitors such as phenols, followed by aromatic amines. The free radical generated from the inhibitor AH can destroy a peroxide group PO2 according to the reaction formula (1-43). (2) Synergy between antioxidants: a well-known example is dicinnamoyl thiodipropionate (DLTDP) or bisstearoyl thiodipropionate (DSTDP) with sterically hindered phenols, in the thermal stability of certain polymers. Another very important example of synergy is the complex effect of sterically hindered phenols and phosphites in improving the melt stability of polyolefins. (3) Stability of polymers using pre-antioxidants: prophylactic or co-antioxidants can decompose hydroperoxides without forming free radical intermediates, therefore, they can prevent the decomposition of hydroperoxides into Free radicals are the resulting branching of the chain.

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