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Dielectric behaviour of aqueous polyelectrolyte solutions. Part 1

par Mandel, Michel ;Jenard, André
Référence Transactions of the Faraday Society, 59, page (2158-2169)
Publication Publié, 1963

Article révisé par les pairs

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Résumé :

The dielectric increments of aqueous solutions of polymethacrylic acid and polyvinylamine have been investigated as function of the polymer concentration, molecular weight and degree of ionization. The experimental results obtained between 10 and 700 kc/sec were extrapolated to higher and lower frequencies to yield values of ε0 and ε∞. A model has been proposed which is based upon the assumption that the polyelectrolyte solution behaves as a suspension of spheroids exhibiting longitudinal polarization which is due to "bound ions". With this model the large values for the dielectric increments, the position of the critical frequency of dispersion and the change of both quantities with the variable parameters may be explained, at least qualitatively.