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Digitale Medien

Critical ion concentrations for clusters in sodium sulfonated polystyrene lonomers (1991)

Park, Jung-Ki ; Park, Byung-Kyu ; Ryoo, Ryong

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 31 (1991), S. 873-878

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Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: The critical ion concentration of sodium sulfonated polystyrene ionomer has been investigated by glass transition, NMR and viscosity measurements. It was found that the critical ion concentration was affected by the molecular weight. The critical ion concentration could be explained by using the linewidths and chemical shifts of 23Na+ NMR spectra. The 23Na+ linewidths of the ionomer solution increased with ion concentration, which could be explained in terms of a shift in the association-dissociation equilibrium between the Na+ and the counter-ion group of the polymer side chain. The reduced viscosity behavior also showed a consistent critical ion concentration.

Zusätzliches Material: 9 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760311206

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