J. Phys. II France
Volume 2, Numéro 9, September 1992
Page(s) 1755 - 1768
DOI: 10.1051/jp2:1992232
J. Phys. II France 2 (1992) 1755-1768

Thermodynamics and hydrodynamics of chemical gels II. Gels in binary solvents

Ken Sekimoto

Department of Applied Physics, Nagoya University, Nagoya 464, Japan

(Received 23 March 1992, accepted in final form 5 June 1992)

We have developed a framework of the thermodynamics and hydrodynamics of chemically crosslinked gels in a binary miscible solvent. This work is an extension of a previous one on gels in a single solvent [Sekimoto K., J. Phys. II France 1 (1991) 19]. Introduction of a composition degree of freedom of the solvent leads to both thermodynamic chemo-mechanical coupling an kinematical cross-coupling between permeation and mutual diffusion of solvent. Using an appropriate thermodynamic potential for gel in a solvent bath, we also discussed (local) equilibrium boundary conditions at the surface of a gel and at the interface between a shrunken phase domain and a swollen phase domain in a gel undergoing a volume phase transition.

82.70G - 62.20 - 05.70L

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