TY - JOUR
T1 - Nongeneric structural-relaxation shape of supercooled liquids
T2 - Insights from linear and nonlinear experiments on propylene glycol
AU - Moch, Kevin
AU - Münzner, Philipp
AU - Gainaru, Catalin
AU - Böhmer, Roland
N1 - Publisher Copyright:
© 2022 Author(s).
PY - 2022/12/21
Y1 - 2022/12/21
N2 - Currently, there is a debate whether the structural relaxation of polar liquids is more faithfully reflected (i) by the generically shaped response detected by dynamic light scattering or rather (ii) by the slower, more stretched, system-dependent susceptibility response recorded by dielectric spectroscopy. In this work, nonlinearly induced transients probing structural relaxation reveal that near the glass transition, alternative (ii) is appropriate for propylene glycol. Results from shear rheology and from calorimetry corroborate this finding, underscoring the previously advanced notion (Moch et al., Phys. Rev. Lett. 128, 228001, 2022) that the reorientationally probed structural susceptibility of viscous liquids displays a nongeneric spectral shape.
AB - Currently, there is a debate whether the structural relaxation of polar liquids is more faithfully reflected (i) by the generically shaped response detected by dynamic light scattering or rather (ii) by the slower, more stretched, system-dependent susceptibility response recorded by dielectric spectroscopy. In this work, nonlinearly induced transients probing structural relaxation reveal that near the glass transition, alternative (ii) is appropriate for propylene glycol. Results from shear rheology and from calorimetry corroborate this finding, underscoring the previously advanced notion (Moch et al., Phys. Rev. Lett. 128, 228001, 2022) that the reorientationally probed structural susceptibility of viscous liquids displays a nongeneric spectral shape.
UR - http://www.scopus.com/inward/record.url?scp=85144359304&partnerID=8YFLogxK
U2 - 10.1063/5.0131568
DO - 10.1063/5.0131568
M3 - Article
C2 - 36550030
AN - SCOPUS:85144359304
SN - 0021-9606
VL - 157
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 23
M1 - 231101
ER -