Effect of alkylated diphenylamine on thermal-oxidative degradation behavior of poly-α-olefin
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Mian-Ran Chao
Abstract
An oil-soluble antioxidant, alkylated diphenylamine (ADPA), was prepared by alkylation of diphenylamine. The influence of ADPA on the thermal-oxidative stability of poly-α-olefin (PAO8) was evaluated by thermogravimetry (TG). For comparison, the thermal-oxidative stability of PAO8 with zinc dialkyl dithiophosphate (ZDDP) was also investigated. Activation energy (Ea) of the corresponding thermal-oxidative degradation process was evaluated by the Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) methods. To demonstrate the reliability of the kinetic study, the antioxidant performance of ADPA and ZDDP in PAO8 was also studied by the pressure drop (PDT) and accelerated oxidation (AOT) tests. The results indicate that ADPA has better antioxidant ability than ZDDP in increasing the Ea value and enhancing the oxidative stability of PAO8. Good correlation between the applied test methods was established.
References
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© 2015 Institute of Chemistry, Slovak Academy of Sciences
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Articles in the same Issue
- Voltammetric determination of B1 and B6 vitamins using a pencil graphite electrode
- An electrochemical sensor for sensitive determination of nitrites based on Ag–Fe3O4–graphene oxide magnetic nanocomposites
- Effect of influent nitrogen concentration on feasibility of short-cut nitrification during wastewater treatment in activated sludge systems
- Assessment of Urtica as a low-cost adsorbent for methylene blue removal: kinetic, equilibrium, and thermodynamic studies
- Electrode and electrodeless impedance measurement for determination of orange juices parameters
- Evaluation of oxidative stability of vegetable oils enriched with herb extracts by EPR spectroscopy
- Electrosynthesis of poly(p-phenylene) and poly(p-phenylene/pyrrole) films under controlled humidity
- Synthesis, characterisation, and electrical properties of novel nanostructured conducting poly(aniline-co-m-chloroaniline) with incorporated silver particles
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- Synthesis and insecticidal activity of anthranilic diamides with hydrazone substructure
- Effect of alkylated diphenylamine on thermal-oxidative degradation behavior of poly-α-olefin
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