Probabilistic interpretation of liquid fragility

After a brief critical review of available interpretations of liquid fragility, our probabilistic approach is introduced and validated by comparing reported fragility data with the material parameters extracted from reported structural relaxation times, namely, the thermodynamic cooperativity NcT and the enthalpy Em and entropy Sm of activated molecular migration available for 26 glassformers. Quantitatively, the relevance of NcT together with Sm and Em as a measure of liquid fragility is verified in principle, and hence our probabilistic interpretation of liquid fragility is supported.