Abstract
The conductance, pH and counterion activity of aliphatic x,y-ionenes were measured to clarify the interaction between ionenes and counterions. The conductometric and potentiometric titrations of basic form ionenes showed that the ionenes are typical strong bases. The conductances of salt form ionenes both in the absence and presence of salts were compared with Manning's equations for both cases. The equivalent conductances for ionenes were lower than the theoretical values. The experimentally determined values of the charge density parameters, higher than the theoretical values, could explain the departure between the experimental and the theoretical values at least semi-quantitatively. The conductance of ionenes in the presence of salts also deviated from the theoretical values, and revealed a marked departure from the additivity rules, dependent on charge density of the ionene as well as the counterions used. On the other hand, the additivity holds approximately for the activity of counterions irrespective of the species of ionenes and counterions. These results may give some information on the conformation of ionenes in solution as well as the mechanism of the electrical conductivity of polyelectrolytes.
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