Thermodynamic Parameters and their Dependence on Temperature in the Range 298–353 K for Ethoxylated Sorbitan Ester Tween 20, 40, 60 and 80 Surfactants |
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| Authors: | Fakkeerappa M Sannaningannavar Shivaram N Patil Raveendra M Melavanki Basalingappa S Navati Narasimha H Ayachit |
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| Affiliation: | 1. , Department of Physics, Karnatak Science College, Dharwad, Karnataka, India;2. NAVKIS, PU Academy, Mysore, Karnataka, India;3. , Department of Physics, M S Ramaiah Institute of Technology, Bangalore, Karnataka, India;4. Department of Physics, Ranichannamma University, Belgaum, Karnataka, India |
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| Abstract: | Thermodynamic parameters of liquid ethoxylated sorbitan ester (Tween 20, 40, 60 and 80) surfactants have been evaluated. For the estimation of these parameters, molar volumes (V) and volume expansion coefficients (α) at different temperatures are employed. These dilatometric studies are predominantly directed towards the establishment of the invariant nature of Sharma's parameter (S0). The S0 and all other parameters values are used to discuss and throw light on the internal structure, molecular order, molecular packing, molecular movement and intermolecular interactions. |
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| Keywords: | Non‐ionic ethoxylated sorbitan esters Tween 20 40 60 and 80 Thermodynamic parameters Volume expansivity Sharma's parameter Gruneisen parameter Fractional free volume Inter molecular free length and available volume |
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