A recent scaling-law analysis using τ∝(T-Tc)-γ with Tc<Tg has concluded that the resulting fits are superior over the Vogel-Fulcher-Tammann temperature dependence as regards the structural relaxation time of supercooled liquids. This issue is investigated based on the dielectric retardation data of poly(vinylacetate) which cover 16 decades in time, from 3 ns to over 1 year. In contrast to Colby's conclusions, the observed temperature dependence rules out a temperature-invariant exponent γ as well as a clear cut critical temperature Tc.
|Original language||English (US)|
|Number of pages||11|
|Journal||Physica A: Statistical Mechanics and its Applications|
|State||Published - Nov 15 2000|
ASJC Scopus subject areas
- Statistics and Probability
- Condensed Matter Physics