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Physical Review Letters
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Critical behavior in gels saturated with binary liquid mixtures

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Abstract

Polyacrylamide, agarose, and silica gels have been prepared with solvents which are nearcritical binary liquid mixtures. Near the critical temperature of the free liquid mixtures, the binary-liquid gel exhibits a broad region wherein light-scattering intensity is large and varies monotonically with temperature. Some features of this scattering suggest that the gel matrix acts like a random field. Only very weak temporal fluctuations are observed throughout this broad transition region. © 1984 The American Physical Society.

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Physical Review Letters

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