Polyion-counterion interactions in sodium carboxymethylcellulose-ethylene glycol-water ternary solutions

► Sodium carboxymethylcellulose was studied in aqueous glycol (EG) conductometrically. ► Concentration-dependent moderate counterion condensation (24-33%) was observed. ► Counterion condensation is spontaneous and depends upon EG-content and temperature. ► A major part of the current is transported by the carboxymethylcellulose polyions. ► Monomers feel more friction as EG-content increases and temperature decreases.