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In this work, a novel chitosan‐based macromolecular rubber antioxidant (denoted as COS‐AO) was successfully synthesized by using chitosan (COS) and 3‐(3,5‐di‐tert‐butyl4‐hydroxyphenyl) propionic acid (antioxidant, AO) via esterification reaction. The FTIR, 1H NMR, 13C NMR, and elemental analysis measurements were used to confirm the structure of COS‐AO. The performance of COS‐AO as a macromolecular...
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