As TPOs are particularly sensitive to oxidation phenomena, they are the most stabilized polymers with antioxidants. It should be noted that the antioxidant efficiency of a molecule can vary depending on the polymer matrix due to potential "antioxidant-polymer" interactions or affinities . To evaluate this point, formulations with a TPO matrix were carried out, with different types of antioxidants at varying concentrations (Table ). Only the antioxidants BDO-3,4 DHB, resveratrol and Irganox 1076 were evaluated, according to the previously obtained results from the thermal stability at 180 °C and DPPH tests. The formulation characteristics are also shown in Table . Thermal degradation of TPO-based formulations in air was assessed by TGA. Indeed, thermooxidative degradation of polyolefins creates free radicals that cause polymer scission chain.