Interactions Between Alkyl Triphenyl Phosphonium Bromides and Polyvinylpyrrolidones in Aqueous Media.

Autor:	Dean, Rebecca, Doiron, Maryjo, Dunlop, Kate, Palepu, RamaM.
Předmět:	FLUORIMETRY CONDUCTOMETRIC analysis POVIDONE POLYMERS SURFACE active agents
Zdroj:	Journal of Dispersion Science & Technology; Sep2008, Vol. 29 Issue 7, p1018-1023, 6p, 4 Charts, 3 Graphs
Abstrakt:	The interactions of polyvinylpyrrolidones with alkyl triphenyl phosphonium bromide in aqueous media were investigated with conductometric, fluorimetric and tensiometric techniques. Formation of surfactant-polymer aggregates was detected in the case of C16 and C14 surfactant by these techniques. Tensiometric technique proved to be very sensitive to detect the early stage of association at very low concentrations. The Gibbs free energy of micellization and the dielectric constant values of the micellar interface values were obtained and discussed in terms of strength of interaction between the polymers and surfactants. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
Externí odkaz:	Zobrazit plný text záznamu Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.