A direct measurement of the length scale of dynamic heterogeneity in supercooled d -sorbitol has been performed using a multidimensional 13 C solid-state NMR experiment. Several models predict that the growth of this length scale is linked to the slowing of dynamics as the glass transition is approached from above. At 275 K ( T g + 7 K), 2.5 ± 1.2 nm heterogeneities are detected in sorbitol. This result and recent results of similar measurements on glycerol, o -terphenyl, and poly(vinyl acetate) are compared to various models. The only model in quantitative agreement with these experimental data is based upon local fluctuations in the configurational entropy.
No takes yet. Share an insight, caveat, or question.
and et al. (2002) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: