Abstract
The properties of volume change of gel stimulated by solvent, pH, ionic strength, temperature, electric power and so on have been dealt with the attracted subjects by many investigators1~19. Especially, the mechanisms of volume change in gels by solvent composition and temperature have roused many researchers from the observation of the phase transition phenomena of the gel systems 6~8. In the case of the volume change caused by pH, ionic strength and ion concentrations, theoretical and experimental considerations on swelling of ionic gels have been represented by Flory1, Kachalsky 2~4 and the other researchers 17~19. It has been pointed out that the contractile force of the network, the electrostatic interactions and the interactions between polymer chain and solvent play an important role of the swelling. Recently, Tanaka and co-workers 14, 15 investigated the swelling behavior of weakly charged ionic gels, such as polyacrylamide-acrylic acid copolymer gel, by the quantitative consistency of the Donnan theory. And they showed that the changes in swelling occurred at the predicted ion concentrations in the solutions.
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© 1991 Plenum Press, New York
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Umemoto, S., Okui, N., Sakai, T. (1991). Contraction Behavior of Poly(acrylonitrile) Gel Fibers. In: DeRossi, D., Kajiwara, K., Osada, Y., Yamauchi, A. (eds) Polymer Gels. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5892-3_19
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DOI: https://doi.org/10.1007/978-1-4684-5892-3_19
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