Pr. Majhi et al., Physicochemical investigations on the interaction of surfactants and saltswith polyvinylpyrrolidone in aqueous medium, J COLL I SC, 235(2), 2001, pp. 227-234
Microcalorimetric investigations have been carried out on the interaction o
f the surfactants sodium cholate, sodium deoxycholate, tetradecyltrimethyla
mmonium bromide, cetyl(hexadecyl) trimethylammonium bromide, and p-tert-oct
ylphenoxy polyoxyethylene ether (Triton X-100) and the salts potassium iodi
de, sodium benzoate, sodium bromide, and sodium salicylate with the neutral
polymer polyvinylpyrrolidone: (PVP). The enthalpy of dilution of the surfa
ctants has been measured in the absence and presence of the polymer and the
results are compared to determine the effect of PVP on the micellization o
f the surfactants and the energetics of the process. As well, the micelliza
tion activity of the surfactants in the presence of the polymer has been st
udied by conductometric and fluorimetric methods. The enthalpy of dilution
of the salts has been measured to provide an understanding of the nature an
d magnitude of their interaction with PVP. (C) 2001 Academic Press.