Theoretical modeling reveals dynamic glass transitions exhaust fluctuating free volume well above the Vogel temperature, indicating a cellular freezing mechanism underlying glass properties.
The conventional free volume, usually externally given by hand, is substituted by an internal fluctuating free volume. The temperature dependence of this free volume can be calculated from the transition to Levy stable distributions assuming dominance of fluctuations in functional α subsystems. An exhausting temperature is obtained (well above the Vogel temperature) where this free volume becomes practically zero. A cellular pattern fluctuating in space and time is suggested for the dynamic glass transition. Partial freezing-in of the cells can qualitatively explain several fundamental properties of glasses.
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E. Donth (1996) studied this question.
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