Abstract
AbstractThermodynamic 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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