ELECTROCHEMICAL PROPERTIES OF CATION-EXCHANGE MEMBRANES MADE OF SULFONATE-CONTAINING POLYPHENYLQUINOXALINES

The electrochemical properties of new ion-exchange membranes obtained from polyphenylquinoxalines with sulfonate groups (PPQ-S) are studied. These membranes are shown to have a high specific conductivity in ele ctrolyte solutions (kappa is 10(-5) to 10(-2) Omega(-1) cm(-1)) and hi gh transport numbers of cations with respect to anions ((t) over bar() is 0.85 to 0.99). The PPQ-S membranes display selective transport in a series of monovalent cations that is not typical for the known memb ranes with high electroconductivity parameters. The analysis of electr ochemical properties as well as the water absorption data of PPQ-S fil ms enables the structure of ion-conducting paths in the membranes made of this polymer to be suggested.