Viscosity Index Improver for Engine Oils: An Experimental Study

Document Type : Original Paper

Authors

Dr. S.S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh, India

Abstract

Engine oils are widely used for lubrication purposes in automobile and related industries. Viscosity Index (VI) improver has found its largest commercial applications as additives to engine oils. Examples are power steering fluid, aircraft piston engine oils, modern internal-combustion engines, turbine engine oils (stationary and aircraft), and industrial gear oils. Viscosity Index improvers are added in the lube oils to reach the desired Viscosity Index (VI). The enhancement of VI of lube oils (Servoneum 100, Servopress 68, Servomesh SP 220, and Servocut 335) by the addition of viscosity index improvers (Methylmethacrylate (MMA), Polybutadiene rubber (PBR), and Polyisoprene-cis) has been studied. VI of blended oils, made from the lube oils (Servoneum 100, Servopress 68, Servomesh SP 220, and Servocut 335) by the addition of MMA, PBR, and Polyisoprene-cis, has shown the potential to reach the maximum value. It has been found that the occurrence of maximum VI depends on the lube oil used and the type and concentration of viscosity index improver.

Keywords

References

[1] Ramasamy, U.S., Lichter, S. and Martini, A. (2016). “Effect of Molecular-Scale Features on the Polymer Coil Size of Model Viscosity Index Improvers.” Tribol Lett, Vol. 62, pp. 23.
[2] Covitch, M.J. and Trickett, K.J. (2015). “How Polymers Behave as Viscosity Index Improvers in Lubricating Oils.” Petroleum Science and Technology, Vol. 5.
[3] Upadhyay, U. Dey, K. and Ghosh, P. (2014). “Multifunctional additives performance of liquid crystal blended dodecyl acrylate in lube oil.” Indian Journal of Chemical Technology, Vol. 21, pp. 244-248.
[4] Ghosh, P. and Das, M. (2014). “Study of the influence of some polymeric additives as viscosity index improvers and pour point depressants – Synthesis and characterization.” Journal of Petroleum Science and Engineering, Vol. 119, pp. 79-84.
[5] Mohamad, S.A., Ahmed, N.S., Hassanein, S.M. and Rashad. A.M. (2012). “Investigation of polyacrylates copolymers as lube oil viscosity index improvers.” Journal of Petroleum Science and Engineering, Vol. 100, pp. 173–177.
[6] Nassar, A.M. and Ahmed, N.S. (2010). “Study the Influence of Some Polymeric Additives as Viscosity Index Improvers, Pour Point Depressants and Dispersants for Lube Oil.” Petroleum Science and Technology, Vol. 28.
[7] Mohammed, A.H.A.K. and Shehab, A. K.-Rubai. (2008). “Viscosity Index Improvement of Lubricating Oil Fraction (SAE – 30).” Petroleum Science and Technology, Vol. 9, pp. 51-57.
[8] Fan, J., Muller, M., Stohr, T. and Spikes, H.A. (2007). “Reduction of Friction by Functionalized Viscosity Index Improvers.” Springer, Vol. 28.
[9] Tanveer, S. and Prasad, R. (2006). “Enhancement of viscosity index of mineral base oils.” Indian Journal of Chemical Technology, Vol. 13, pp. 398-403.
[10] Nassar, A.M., Ahmed, N.S., Kamal, R.S., Abdel Azim, A.A.A. and Nagdy, E.I. (2005). “Preparation and Evaluation of Acrylate Polymers as Viscosity Index Improvers for Lube Oil.” Petroleum Science and Technology, Vol. 23, pp. 537-546.
[11] Ghosh, P., Pantar, A.V., Rao, U.S. and Sarma, A.S. (1998). “Shear stability of polymers used as viscosity modifiers in lubricating oils.” Indi-an Journal of Chemical Technology, Vol. 5, pp. 309-314.
[12] IS: l448 (P: 56) 1980 (Indian Standards on Viscosity Index Calculation).
[13] IS: l448 (P: 25) 1976 (Indian Standards on kinematic viscosity by Redwood Viscometer).
Journal of Chemical and Petroleum Engineering
Volume 51, Issue 1
June 2017
Pages 39-45

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History

  • Receive Date: 11 October 2015
  • Revise Date: 17 June 2017
  • Accept Date: 17 June 2017

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