TY - JOUR
T1 - Comparing two sources of physical aging
T2 - Temperature vs electric field
AU - Gabriel, Jan P.
AU - Richert, Ranko
N1 - Publisher Copyright:
© 2023 Author(s).
PY - 2023/10/28
Y1 - 2023/10/28
N2 - Physical aging is the process of a system evolving toward a new equilibrium, and thus the response to a change in external parameters such as temperature T, pressure p, or static electric field E. Using a static electric field has been shown to access physical aging above the glass transition temperature Tg, in the regime of milliseconds or faster, but the relation to its temperature jump counterpart has not been investigated to date. This work compares temperature and field induced physical aging in the limit of small perturbations for supercooled tributyl phosphate. It is found that both structural recovery dynamics are very similar, and that they match the collective reorientational dynamics as observed by dielectric relaxation. The results facilitate expanding the range of aging experiments to well above Tg, where a comparison with structural relaxation in equilibrium is straightforward, thus improving models of structural recovery and physical aging.
AB - Physical aging is the process of a system evolving toward a new equilibrium, and thus the response to a change in external parameters such as temperature T, pressure p, or static electric field E. Using a static electric field has been shown to access physical aging above the glass transition temperature Tg, in the regime of milliseconds or faster, but the relation to its temperature jump counterpart has not been investigated to date. This work compares temperature and field induced physical aging in the limit of small perturbations for supercooled tributyl phosphate. It is found that both structural recovery dynamics are very similar, and that they match the collective reorientational dynamics as observed by dielectric relaxation. The results facilitate expanding the range of aging experiments to well above Tg, where a comparison with structural relaxation in equilibrium is straightforward, thus improving models of structural recovery and physical aging.
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U2 - 10.1063/5.0176957
DO - 10.1063/5.0176957
M3 - Article
C2 - 37877489
AN - SCOPUS:85175221710
SN - 0021-9606
VL - 159
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 16
M1 - 164502
ER -