Predictability of properties of ternary systems solvent/solvent/polymer from interaction parameters of the binary systems—III. Analysis of binary potential functions forming ternary ones

Abstract

The assumption that the ternary parameter, g τ , and its derivative with respect to polymer concentration, ( ∂g τ / ∂φ 3) μ 1, φ 3 → 0 , can be described by three binary interaction parameters, g o i3 ( i = 1, 2) and g 12, implies that these must be independent functions. This feature has been demonstrated by using g o i3 values obtained from A/B/polymer(P) and C/D/P ternary polymer systems to predict the ternary properties, namely preferential solvation (λ), second virial coefficient ( A 2) and intrinsic viscosity ([η]), of a A/C/P ternary system. Two distinct polymers, polystyrene(PS) and poly(dimethylsiloxane)(PDMS), have been utilized in three solvent mixtures, benzene(BZ)/cyclohexane(CH), BZ/acetone(AC) and CH/AC for PS and n-undecane(UND)/butanone(MEK), n-heptane(HEP)/MEK and UND/HEP for PDMS. Ternary properties predicted through either g o i3 published values or g o i3 from λ and A 2 correlation data agree well with the experimental values for all the systems studied.