Abstract
The dependences of the amounts of hydration water and “free” water in equilibrium water-swollen crosslinked organic polyelectrolytes—namely, the sulfonated copolymer of styrene and 8 wt % divinylbenzene, cationite KRS-8p, and the copolymer of poly(acrylic acid) and 6 wt % ethylene glycol dimethacrylate, cationite Biocarb-A—on the degree of replacement of hydrogen ions in ionogenic groups with Na+, K+, Mg++, Ca++, Co++, and Zn++ in the range 270–333 K are determined. Their relaxation transitions from the glassy state to the rubbery state are studied. Glass-transition temperatures for various mixed salt forms of these cationites are measured. Patterns of dependences of the equilibrium amounts of hydration water and the glass-transition temperatures of swollen cationites on the types and concentrations of exchangeable ions are ascertained. The relaxation states and phase compositions of the studied cationite-water systems are determined.
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Original Russian Text © E.A. Krylov, N.I. Mashin, N.I. Sirotkin, A.A. Tumanov, E.A. Cherniaeva, 2015, published in Vysokomolekulyarnye Soedineniya. Ser. A, 2015, Vol. 57, No. 4, pp. 287–294.
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Krylov, E.A., Mashin, N.I., Sirotkin, N.I. et al. Influence of the types and concentrations of exchangeable ions on the state of crosslinked organic polyelectrolyte-water systems. Polym. Sci. Ser. A 57, 375–382 (2015). https://doi.org/10.1134/S0965545X15040082
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DOI: https://doi.org/10.1134/S0965545X15040082