Thermal decomposition kinetics and anti-oxidation performance of commercial antioxidants
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The thermal stability of 2, 6-Di-tert-butyl-4-methylphenol (T501) and N-Phenyl-1-naphthylamine (T531) was comparatively investigated using thermogravimetry(TG)/derivative thermogravimetry under air atmosphere. Activation energies of the corresponding thermal decomposition process were evaluated by Flynn–Wall–Ozawa and Kissinger methods. Pressurized differential scanning calorimetry and TG methods were also employed to study their antioxidant performance in different kinds of lubricating oils. The thermal analysis and kinetic study showed that the thermal stability of T531 was superior to that of T501. The oxidation tests indicated that T531 exhibited better anti-oxidation property than T501 in the tested oils. All the results demonstrated that T531 was a more efficient antioxidant with outstanding thermal stability and oxidation resistance.
KeywordsAntioxidant Thermal decomposition Kinetics Flynn–Wall–Ozawa(FWO) Kissinger Anti-oxidation performance
This work was supported by the Major State Basic Research Development Program of China (973 Program) (Grant No. 2013CB632301).
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