Thermogravimetric analysis in the synthetic engine oil 5W-30
 
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1
Motor Transport Institute in Warsaw.
2
Faculty of Machines and Transport at Poznan University of Technology
Publication date: 2017-08-01
 
Combustion Engines 2017,170(3), 188–192
 
KEYWORDS
ABSTRACT
Engine oils undergo oxidative degradation and wears out during service. Hence it is important to characterize ageing of engine oils at different simulated conditions to evaluate the performance of existing oils and also design new formulations. This work focuses on characterizing the thermo-oxidative degradation of synthetic engine oils 5W-30. Thermogravimetric analysis of fresh and degraded oil samples at different temperatures and ageing intervals was performed in STA 449 F3 Jupiter® coupled with the FTIR spectrometer. The temperature regime provided that the samples were heated to the temperature of 600°C at the heating rate of 10 K/min. Gases (nitrogen, argon) were used with flow rates of 60 mL/min. The results, along with discussion, are presented in graphs – TG curves and IR spectrum
 
REFERENCES (10)
1.
ADHVARYU, A., PEREZ, J.M., SINGH, I.D. Application of quantitative NMR spectroscopy to oxidation kinetics of base oils using a pressurized differential scanning calorimetry technique. Energy Fuels. 1999, 13, 493-498.
 
2.
BAKER, A.E. Hand book of lubrication. Theory and practice of tribology. Booser, E.R., Ed.; CRC press: Boca Raton, FL, USA, 1983, 1, 481.
 
3.
CRNKOVIC, P.M., LEIVA, C.R.M, DOS SANTOS, A.M., MILIOLI, F.E. Kinetic study of the oxidative degradation of Brazilian fuel oils. Energy Fuels. 2007, 21, 3415-3419.
 
4.
GAMLIN, C.D., DUTTA, N.K., CHOUDHURY, N.R. et al. Evaluation of kinetic parameters of thermal and oxidative decomposition of base oils by conventional, isothermal and modulated TGA, and pressure DSC. Termochimica Acta. 2002, 393, 357-369.
 
5.
LEHRLE, R.S., DUNCAN, R., LIU, Y. et al. Mass spectrometric methods for assessing the thermal stability of liquid polymers and oils: study of some liquid polyisobutylenes used in the production of crankcase oil additives. J. Anal. Appl. Pyrol. 2002, 64, 207-227.
 
6.
LISTON, T.V. Engine lubricant additives. What they are and how they function? Lubr. Eng. 1992, 48, 389-397.
 
7.
MORTIER, R.M., ORSZULIK, S.T. Chemistry and technology of lubricants. VCH Publisher: New York, NY, USA, 1992.
 
8.
SANTOS, J.C.O., DOS SANTOS, I.M.G., SOUZA, A.G. et al. Thermoanalytical and rheological characterization of automotive mineral lubricants after thermal degradation. Fuel. 2004, 83, 2393-2399.
 
9.
SYED, R. Lubricant additives. A comprehensive review of lubricants chemistry, technology, selection, and design. ASTM International: West Conshohocken, PA, USA. 2009.
 
10.
WOOTON, D. The lubricant's nemesis – oxidation. Practicing Oil Analysis. 2007. Available online: ww.machinerylubrication.com/Ar....
 
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