Binding of Cd2+ and Na+ ions by poly(sodium 4-styrenesulfonate) analyzed by ultrafiltration and its relation with the counterion condensation theory
Article Abstract:
Polymers have extensive potential technical applications. Experiments were conducted to evaluate metal ion retention profiles in ultrafiltration of high molecular weight polymers and metal ions. Mathematical analyses of polymer-metal ion interactions were performed. The retention profiles of a mixture of mono and divalent metal ions by poly(sodium 4-styrene-sulfonate) were examined. A fraction of metal ions remained attached to the polymer at the limit of infinite elution. Moreover, the conditions in Manning's limiting law, pertaining to metal ion distribution were met.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Evaluation of the counterion condensation theory from the metal ion distributions obtained by ultrafiltration of a system poly(sodium 4-styrenesulfonate)/Cd2+/Na+
Article Abstract:
Research was conducted to examine the validity of the Manning's two-variable counterion condensation theory concerned with long-range interactions. The ultrafiltration of the metal ion distributions of a solution of poly(sodium 4-styrenesulfonate) in the presence of Cd2+ and Na+ ions was performed in a steady state mixed flow reactor where the binding and elution processes may be formulated as a chemical reaction. Results indicate that the original theory results are not sufficient to explain the metal ion distributions derived.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Four-component micellar model for small-angle scattering applications: a SANS study of the core and counterion profiles of sodium alkyl sulfate micelles
Article Abstract:
Multishell models used for calculating the elementary scattering amplitude from micelles are replaced by the Fourier transforms of the probability density functions of finding the hydrophobic groups and counterions at a particular distance from the micellar center. Application of the model to almost spherical sodium nonyl-, decyl and undecyl sulfate micelles leads to reasonable best-fit values.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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