Dissolved states of ionene polymers in water-acetone and their relation to the ionic partial molar adiabatic compressibility and volume

Solution properties of water-soluble synthetic polymer, 3,3-ionene and 6,6-ionene chloride and bromide disolved in water-acetone mixtures up to acetone content 50 wt% were investigated. Their partial molar volumes V2o and partial molar adiabatic compressibilities Kso were determined. Ionic additivity of V2o with respect to the cation of backbone polymer chain and the counter-anion was confirmed quantitatively. The ionic additivity of V2o is discussed along with the Kso in their relation to the counterion binding of ionene polymers. Effects of ionic sites on the ionene are strong but they don't break the solvation layer.