CALORIMETRIC AND VISCOSIMETRIC INVESTIGATION OF THE INTERACTION BETWEEN ALPHA,BETA-POLYASPARTHYDRAZIDE AND SODIUM DODECYL-SULFATE MICELLES

The interaction between alpha,beta-polyasparthydrazide (PAHy) and sodi um dodecyl sulfate (SDS) micelles in aqueous solution was investigated by calorimetry and viscosimetry. The dependence of the enthalpic effe ct due to this interaction upon the surfactant concentration was ratio nalized in terms of a progressive binding of SDS micelles to the polym eric backbone. The analysis of the calorimetric data allow evaluation of the binding ability of SDS micelles to the polymeric chain. The vis cosimetric behavior of SDS plus PAHy aqueous solutions, discussed in t erms of the parameter F [F = eta(rel(PAHy)) + eta(rel(SDS)) - eta(rel( SDS+PAHy))], confirms the occurrence of the interaction between SDS mi celles and the PAHy macromolecule.