Abstract
The reduced viscosity of high molecular weight poly(vinylamine) (PVAm) depends greatly on pH, ionic strength, and heavy-metal ion concentration. The reduced viscosity of PVAm shows a maximum at pH≍3 in the case of the ionic strength μ=0 (KCl): in the region of pH<3 the viscosity decreased abruptly and the change of pH to the basic region also brought about a decrease of the viscosity. A similar tendency was observed in the presence of a salt KCl (μ=0.01, 0.1 and 1.0). A PVAm gel was prepared to apply these behaviors for a chemo-mechanical material. The gel shows a good response with respect to the changes of pH, ionic strength, and cupric ion concentration. In addition, a phenomenon of phase transition is observed in PVAm gel under certain conditions.
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Kobayashi, S., Suh, KD., Shirokura, Y. et al. Viscosity Behavior of Poly(vinylamine) and Swelling-Contraction Phenomenon of Its Gel. Polym J 21, 971–976 (1989). https://doi.org/10.1295/polymj.21.971
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DOI: https://doi.org/10.1295/polymj.21.971
