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Thermodynamic Interpretation of the SEC Behavior of Polymers in a Polystyrene Gel Matrix
Author(s) -
García Rosa,
Gómez Clara M.,
Figueruelo Juan E.,
Campos Agustín
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010601)202:9<1889::aid-macp1889>3.0.co;2-d
Subject(s) - solvation , ternary operation , polymer , thermodynamics , polystyrene , chemistry , ternary numeral system , flory–huggins solution theory , phase (matter) , activity coefficient , polymer chemistry , solvent , organic chemistry , physics , aqueous solution , computer science , programming language
Binary and ternary interaction functions dependent on the composition of the components of a ternary polymer system – solvent(1)/polymer(2)/polymer(3) – have been obtained. To attain this goal the equilibrium compositions of the three components from liquid‐liquid equilibria have been determined. The interaction functions show a good coincidence with reported ones and have been used to better understand the SEC mechanisms and the preferential solvation phenomenon. For these purposes, we first have derived an expression that relates the distribution coefficient of the solute between the mobile phase and the stationary phase in SEC experiments with the interaction functions and the composition of the ternary phase. Second, an expression to calculate the preferential solvation coefficient for solvent(1)/polymer(2)/polymer(3) systems has been derived as a function of the interaction functions and of the system composition. A good qualitative accordance has been noticed between the SEC distribution coefficient and the preferential solvation parameter.