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Solution Behavior of the Poly[bis(phenoxycarboxylate)]phosphazene Polyelectrolyte (Articolo in rivista)

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Solution Behavior of the Poly[bis(phenoxycarboxylate)]phosphazene Polyelectrolyte (Articolo in rivista) (literal)

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Alternative label

M. Dentini, A. Barbetta, G. Masci, V. Crescenzi, D. Capitani, A.L. Segre (1997)
Solution Behavior of the Poly[bis(phenoxycarboxylate)]phosphazene Polyelectrolyte
in Macromolecules (Print); American Chemical Society, Washington (Stati Uniti d'America)
(literal)

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M. Dentini, A. Barbetta, G. Masci, V. Crescenzi, D. Capitani, A.L. Segre (literal)

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Istituto di Metodologie Chimiche Dipartimento di Chimica, Sapienza Università di Roma (literal)

Titolo

Solution Behavior of the Poly[bis(phenoxycarboxylate)]phosphazene Polyelectrolyte (literal)

Abstract

The behavior of a high molecular weight sodium poly[bis(carboxylatophenoxy)phosphazene] (NaPCPP) polyelectrolyte sample in aqueous solution has been investigated by means of viscosity, conductivity, sodium counterion potentiometric ''activity coefficient'' (gamma(+)) measurements, and Na-23-NMR experiments. The set of data clearly and consistently points out the peculiar polyelectrolytic behavior of NaPCPP in water. In our opinion, this is essentially due to the pal tial hydrophobic character of flexible NaPCPP chains which would easily ''entangle'' even at low concentrations in water and, in addition, would give rise to ''entanglement collapse'' with increasing solution temperature. (literal)

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