Abstract
Zero-shear viscosity η° and steady-state complinance Jc of poly(N-methyl-2-vinylpyridinium chloride) solutions were measured in the absence and presence of added-salt over a wide range of polymer concentration. The polymer concentration dependence of η° in semidilute regions increases with increasing added-salt concentrations Cs and almost agrees with that for non-ionic polymers in good solvents at high added-salt concentrations. JC in dilute regions depends on molecular weight M, polymer concentration C and Cs more strongly than that of non-ionic polymer solutions, as given by Jo ∝ M-2Cs. In entangled regions, on the other hand, Jc depends on polymer concentration only in the same manner as that of non-ionic polymer solutions, but its concentration dependence is weaker than that of non-ionic polymer solutions, as given by Je∝C-1.3. Moreover, the polymer concentration dependence of the weight-average relaxation time tw increases with increasing added-salt concentration in the semidilute region for η° and the entangled region for Jc. These viscoelastic properties of entangled-polyelectrolyte solutions can be well explained by the reptation model assuming that the correlation lengths related to entanglements are determined by the electrostatic interactions evaluated from the Donnan equilibrium.
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© 1992 Springer-Verlag Berlin Heidelberg
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Noda, I. (1992). Viscoelastic Properties of Semidilute Polyelectrolyte Solutions. In: Imanishi, Y. (eds) Progress in Pacific Polymer Science 2. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77636-6_18
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DOI: https://doi.org/10.1007/978-3-642-77636-6_18
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-77638-0
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