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  • Chem Sci Trans., 2014, 3(2),  pp 494-497  

    DOI:10.7598/cst2014.593

    Research Article

    Effect of n-Alkylamines on Micellization of Aqueous Sodium Dodecyl Sulphate Solutions through Ultrasonic Measurements

  • K. RAJU, C. RAKKAPPAN and K. KARPAGAVALLI
  • 1Department of Physics, Sri Venkateswara College of Engineering, Sriperumbudur-602105, India
    2Department of Physics (DDE), Annamalai University, Annamalai Nagar-608002, India
    3Department of Physics, A.V.C.College of Arts and Science, Mayiladuthurai, India
  • Abstract

    Acoustical studies are undertaken in 0.025 m aqueous solution of SDS with the addition of n-alkyl amines (ethylamine, diethyl amine and triethyl amine) at various concentrations ranging from 0.01 to 0.05 molar at 303 K. From the measured values of velocity, density, viscosity and observed absorption (a/f2) obs, various other parameters such as compressibility, free length, free volume, relative association, Rao’s constant, classical absorption (a/f2)cl, excess absorption (a/f2)ex, volume viscosity and relaxation time are calculated and reported. The results indicate that the addition of amines to the surfactant activates the micellar growth and leads to solubilization of shorter chain amines.

    Keywords

    Ultrasonic velocity, Compressibility, Ultrasonic absorption, SDS, Free length

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