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Microstructure and phase diagrams of polymer gels

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  • Panyukov, Sergei
  • Rabin, Yitzhak

Abstract

Recently we developed [Panyukov and Rabin, Macromolecules 29 (1996) 7960] a phenomenological theory of randomly cross-linked polymer networks, based on the separation of solid-like and liquid-like degrees of freedom and taking into account the frozen inhomogeneity of network structure. We calculated the scattering spectra of weakly charged, randomly cross-linked polymer gels in good, poor and in Θ solvents [Panyukov and Rabin, Macromolecules 29 (1996) 8530; Rabin and Panyukov, Macromolecules 30 (1996) 301]. For some values of the thermodynamic parameters, the competition between poor solubility, electrostatics and network elasticity leads to the divergence of the structure factor at a wave vector q∗, signaling the onset of microphase separation in the gel. Depending on the choice of thermodynamic parameters, the characteristic wavelength 1/q∗ varies from microscopic to macroscopic length scales.

Suggested Citation

  • Panyukov, Sergei & Rabin, Yitzhak, 1998. "Microstructure and phase diagrams of polymer gels," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 249(1), pages 239-244.
    • Handle: RePEc:eee:phsmap:v:249:y:1998:i:1:p:239-244
    DOI: 10.1016/S0378-4371(97)00471-8
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    Keywords

    Polymer gels; Static inhomogeneities;

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