The stepwise protonation of three polymeric amines, containing a different shielding group between the amine moieties of the repeating units, has been studied from a thermodynamic standpoint. This was done for comparison purposes with structurally related poly(amido amines) whose monomeric units had been previously found to behave independently toward protonation. This study was performed by potentiometric and calorimetric techniques, and specific methods for the treatment of either ‘sharp’ or ‘apparent’ thermodynamic functions in polyelectrolyte having more than one basic group in the repeating unit have been developed.
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Barbucci et al. (1983) studied this question.