TY - JOUR
T1 - Scaling vs. Vogel-Fulcher-type structural relaxation in deeply supercooled materials
AU - Richert, Ranko
PY - 2000/11/15
Y1 - 2000/11/15
N2 - 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.
AB - 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.
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U2 - 10.1016/S0378-4371(00)00451-9
DO - 10.1016/S0378-4371(00)00451-9
M3 - Article
AN - SCOPUS:0034319356
SN - 0378-4371
VL - 287
SP - 26
EP - 36
JO - Physica A: Statistical Mechanics and its Applications
JF - Physica A: Statistical Mechanics and its Applications
IS - 1-2
ER -