Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes

Tracer diffusion coefficients of Ag+ in silver polystyrenesulfonate and counterion activity coefficients of sodium and silver polystyrenesulfonates have been determined at different concentrations. The results have been analyzed using a simple electrostatic model which assumes the polyions to be par...

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Publicado: 1969
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223654_v73_n5_p1420_FernandezPrini
http://hdl.handle.net/20.500.12110/paper_00223654_v73_n5_p1420_FernandezPrini
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00223654_v73_n5_p1420_FernandezPrini
record_format dspace
spelling paper:paper_00223654_v73_n5_p1420_FernandezPrini2023-06-08T14:50:10Z Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes Tracer diffusion coefficients of Ag+ in silver polystyrenesulfonate and counterion activity coefficients of sodium and silver polystyrenesulfonates have been determined at different concentrations. The results have been analyzed using a simple electrostatic model which assumes the polyions to be parallel sheets of uniform charge density distributed in the volume of the solution. This model enabled the derivation of a relationship between tracer diffusion and activity coefficients of counterions. Data for sodium dodecyl sulfate and partially neutralized polyacrylic acid were also examined. The activity coefficients of the counterions in the polyelectrolyte solutions were calculated from the theoretical relationship between activity and tracer diffusion coefficients, with the experimental values for the tracer diffusion coefficients. According to the model employed, if the distance between adjacent charged groups on the chain is constant, activity and tracer diffusion coefficients should be independent of concentration. It was possible to explain satisfactorily the low values and similar behavior of activity and tracer diffusion coefficients for a given counterion as concentration varied. The model is, however, more useful when dealing with properties of polyelectrolytes having different degree of ionization. 1969 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223654_v73_n5_p1420_FernandezPrini http://hdl.handle.net/20.500.12110/paper_00223654_v73_n5_p1420_FernandezPrini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Tracer diffusion coefficients of Ag+ in silver polystyrenesulfonate and counterion activity coefficients of sodium and silver polystyrenesulfonates have been determined at different concentrations. The results have been analyzed using a simple electrostatic model which assumes the polyions to be parallel sheets of uniform charge density distributed in the volume of the solution. This model enabled the derivation of a relationship between tracer diffusion and activity coefficients of counterions. Data for sodium dodecyl sulfate and partially neutralized polyacrylic acid were also examined. The activity coefficients of the counterions in the polyelectrolyte solutions were calculated from the theoretical relationship between activity and tracer diffusion coefficients, with the experimental values for the tracer diffusion coefficients. According to the model employed, if the distance between adjacent charged groups on the chain is constant, activity and tracer diffusion coefficients should be independent of concentration. It was possible to explain satisfactorily the low values and similar behavior of activity and tracer diffusion coefficients for a given counterion as concentration varied. The model is, however, more useful when dealing with properties of polyelectrolytes having different degree of ionization.
title Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
spellingShingle Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
title_short Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
title_full Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
title_fullStr Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
title_full_unstemmed Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
title_sort tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes
publishDate 1969
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223654_v73_n5_p1420_FernandezPrini
http://hdl.handle.net/20.500.12110/paper_00223654_v73_n5_p1420_FernandezPrini
_version_ 1768546195752353792

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