Microstructure and phase diagrams of polymer gels

Sergei Panyukov and Yitzhak Rabin

Physica A: Statistical Mechanics and its Applications, 1998, vol. 249, issue 1, 239-244

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.

Keywords: Polymer gels; Static inhomogeneities (search for similar items in EconPapers)
Date: 1998
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:249:y:1998:i:1:p:239-244

DOI: 10.1016/S0378-4371(97)00471-8

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