Interactions Between Alkyl Triphenyl Phosphonium Bromides and Polyvinylpyrrolidones in Aqueous Media

Autor:	Rebecca Dean, Kate Dunlop, Maryjo Doiron, Rama M. Palepu
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Polymers and Plastics Conductometry Chemistry Inorganic chemistry Polymer Micelle Fluorescence spectroscopy Surfaces Coatings and Films Gibbs free energy symbols.namesake chemistry.chemical_compound Pulmonary surfactant Bromide symbols Organic chemistry Physical and Theoretical Chemistry Alkyl
Zdroj:	Journal of Dispersion Science and Technology. 29:1018-1023
ISSN:	1532-2351 0193-2691
Popis:	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.
Databáze:	OpenAIRE
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