Among the different additives, antioxidants play a crucial role in the formulation of plastic materials. The addition of antioxidants delays oxidation and therefore the degradation of materials during their processing (oxidation under thermomechanical treatment) and during their use . Antioxidants are classified into two categories according to their modes of action with (i) primary antioxidants, which have the ability to neutralize all or some of the radicals (R•, RO•, ROO•, HO•) by proton transfer, and (ii) secondary antioxidants, which break down the formed hydroperoxides (ROOH).