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The effective growth rate of critical fluctuations in the unstable region of the system polydimethylsiloxane-diethyl carbonate was found to be time independent for an appreciable time and the negative composition diffusivity D* to be represented by the power law of D*∝ε^ν* with ν*≈0.62, where ε=|(T-Tc)Tc|. The value of D* was approximately three times larger than the positive composition diffusivity D at the same ε in the stable region.
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Kuwahara et al. (1982) studied this question.
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