Polymer-surfactant interactions. A quantitative approach to the enthalpy of transfer of poly(ethylene glycol)s from water to the aqueous sodium perfluoroalkanoates solutions

Article Abstract:

The enthalpy of transfer of nonionic polymers at a fixed concentration and at very low concentrations, from water to aqueous substrate solutions as a function of the substrate concentration was determined to obtain quantitative information on the surfactant-polymer interactions. The standard free energy and the enthalpy and the entropy for the polymer-surfactant complex formation was determined and the findings suggest that micelles complex formation are consistent with the micelles being wrapped by the polymer chains.

Cyclic Crude and Intermediate Manufacturing, Ethylene, Polymers, Micelles, Chemical properties

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Aqueous block copolymer-surfactant mixtures and their ability in solubilizing chlorinated organic compounds. A thermodynamic and SANS study

Article Abstract:

Volumetric, solubility, conductivity and small-angle neutron scattering (SANS) experiments are carried out at 298 K on mixtures composed of [alpha][omega]-dichloroalkane, surfactant, copolymer and water. The SANS and conductivity experiments have shown that the structural properties of the aggregates are not influenced by the additive incorporation into the mixed and the pure micelles.

Analysis, Neutrons, Optical properties, Electrical conductivity, Block copolymers, Neutron scattering, Structure, Hydrophobic effect

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Mass action model applied to the thermodynamic properties of transfer of nonionic copolymers from water to the aqueous surfactant solutions

Article Abstract:

The thermodynamic properties of transfer of unassociated nonionic copolymers, at fixed concentration, from water to the aqueous surfactant solutions to fit quantitavely are studied. The generated fitting parameters provided information, which supports the validity of the proposed model.

Electric properties, Chemistry, Physical and theoretical, Physical chemistry, Thermodynamics, Mechanical properties, Aqueous solution reactions, Copolymers

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