Abstract
Solution properties of aqueous mixtures of the homologous series of polyoxyethene glycol mono-n-butyl ethers C4H9O(CH2CH2O) m H (where m=1 to 3) have been investigated using surface tension, density, viscosity and13C NMR techniques. From the experimental data, excess volume and deviation of viscosity and free energy of activation of flow were evaluated and discussed in terms of the molecular interactions between the components. Surface activity of polyoxyethene glycol mono ethers in aqueous dilute solutions was evident from surface tension measurements. Thermodynamic properties of adsorption and apparent micellization or critical aggregation concentration (CAC) in these systems were evaluated and discussed. The CAC values and the aggregation numbers obtained from13C NMR chemical shift data indicate an increase in hydrophobicity with an increase in the value of m, in the polyoxyethene glycol mono-n-butyl ethers, and also agrees with the results obtained from surface tension measurements.
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Smith, S., Wiseman, P., Boudreau, L. et al. Effect of microheterogeneity on bulk and surface properties of binary mixtures of polyoxyethene glycol monobutyl ethers with water. J Solution Chem 23, 207–222 (1994). https://doi.org/10.1007/BF00973547
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DOI: https://doi.org/10.1007/BF00973547