6533b7d3fe1ef96bd1260878
RESEARCH PRODUCT
A thermodynamic analysis on the coincidence of extrema conditions in the sorption equilibrium for ternary polymer systems
Rosa GarcíaVicente SoriaClara M. GómezAgustín Campossubject
chemistry.chemical_classificationQuantitative Biology::BiomoleculesTernary numeral systemPolymers and PlasticsChemistryThermodynamicsSorptionPolymerCoincidenceCondensed Matter::Soft Condensed MatterMaxima and minimaColloid and Surface ChemistryVolume fractionMaterials ChemistryPhysical and Theoretical ChemistrySolvent effectsTernary operationdescription
Flory-Huggins theory of polymer solutions has been used to express the condition of extrema values in the total sorption, as well as the inversion point in the preferential adsorption parameters for termary polymer systems. Two approaches have been followed, the first considers the binary and ternary interaction parameters independent of polymer concentration and solvent composition. In the second one, this dependence has been introduced. Our attention is focused on the volume fraction of solvent mixture dependence of the above parameters, in order to confirm or not the coincidence between the extrema values and the inversion point. Several cosolvent and cononsolvent ternary polymer systems, have been used to test the validity of the equations obtained. Also, it has been verified, from an experimental point of view, that in cosolvent ternary polymer systems there is coincidence in both compositions while in cononsolvent ternary polymer systems, such coincidence does not appear.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-07-01 | Colloid & Polymer Science |