Abstract:
The polyelectrolyte – surfactant complexes formation has been studied. The critical micelle concentration for
every polyelectrolyte and surfactant which had been used has been measured on this purpose The phase behaviour of
mixtures of a cationic polyelectrolyte (Praestol 644) and an anionic surfactant (sodium lauryl sulphate – SLS) has been
studied. Three phase regions were identified for a given polyelectrolyte concentration, with increasing surfactant
concentration. The rheological consequences of interactions of polyelectrolytes with surfactants of the opposite charge are
experimentally studied. The results reveal that the Praestol 644 solution has the Bingham pseudoplastic, reopectic and
viscoelastic and the complex solutions lose the viscoelastic and rheopectic rheological properties.
