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Phase transition in swollen gels

4. Effect of concentration of the crosslinking agent at network formation on the collapse and mechanical behaviour of polyacrylamide gels

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Summary

The effect of concentration of the crosslinking agent on the swelling equilibrium and mechanical behaviour of poly(acrylamide) gels with a low content of sodium methacrylate (molar fraction xMNa = 0.012) was investigated in acetone-water mixtures. The increasing concentration of the crosslinking agent suppresses the extent of phase transition Δ (determined by a change in the gel volume) and decreases the critical value of the interaction parameter χc (given by the composition of the acetone-water mixture) at which the collapse takes place; these dependences are in a semiquantitative agreement with the recent molecular theory which describes the swelling equilibria of polyelectrolyte networks.

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Authors and Affiliations

  1. Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, CS-16206, Prague 6, Czechoslovakia

    M. Ilavský & J. Hrouz

Authors
  1. M. Ilavský
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  2. J. Hrouz
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Ilavský, M., Hrouz, J. Phase transition in swollen gels. Polymer Bulletin 8, 387–394 (1982). https://doi.org/10.1007/BF00265257

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  • DOI: https://doi.org/10.1007/BF00265257

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