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Investigations on the Binary Mixtures of Organic Additives in Lubricating Oil - SAE15W40 through Ultrasound Velocity Measurements

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Author Affiliations

  • 1Department of Physics, Syed Ammal Engineering College, Ramanathapuram-623 501, Tamil Nadu, INDIA
  • 2Department of Mechanical Engineering, Syed Ammal Engineering College, Ramanathapuram-623 501, Tamil Nadu, INDIA
  • 3Department of Chemistry, Syed Ammal Engineering College, Ramanathapuram-623 501, Tamil Nadu, INDIA

Res.J.chem.sci., Volume 3, Issue (5), Pages 43-46, May,18 (2013)

Abstract

Thermo, Acoustical and Dielectric (TAD) parameters such as adiabatic compressibility (), intermolecular free length (L), acoustical impendence (Z), dielectric constant (ε), surface tension (S), relaxation time (ζ), Gibb’s free energy (ΔG) and its excess functions (A) have been calculatedfor the binary mixtures of lubricating oil-SAE15w40 with toluene and benzene from ultrasound velocity (u),density (ρ) and viscosity (η)measurements. These measurementswere carried out at various concentration of oil from 0% to 100% in steps of 20% at 308.15K.From the data’s of TAD parameters and their excess values, it is very obvious that there exist a hetero interaction existing between the unlike molecules.

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