Thermodynamic properties of concentrated heteroionic polyelectrolyte solutions
The water sorption isotherms of concentrated sodium-caesium polystyrene sulphonate solutions have been measured as a function of the ionic composition at 298.15 K. Also the densities of the solid-like solutions are reported at various water contents. The systems obey the B.E.T. isotherm only over a...
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03009599_v83_n11_p3249_Corti |
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| Sumario: | The water sorption isotherms of concentrated sodium-caesium polystyrene sulphonate solutions have been measured as a function of the ionic composition at 298.15 K. Also the densities of the solid-like solutions are reported at various water contents. The systems obey the B.E.T. isotherm only over a limited range of concentration, but empirical equations have been found which describe the behaviour of the linear and crosslinked ion-exchangers over the concentration range of practical interest. The heteroionic systems studied here are far from ideal behaviour; anomalies are found in the sodium-rich region, probably caused by a lattice-like structure involving caesium ions. |
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