2005/11/30 by U. Buchenau, Michael Ohl, M. Ohl +1 · 2 citations
Chemical Engineering · Engineering · Materials Science · Physics and Astronomy · #Material Dynamics and Properties #Phase Equilibria and Thermodynamics #Thermodynamic properties of mixtures #cond-mat.dis-nn
paper · pdf · doi:10.1063/1.2176618
published as J. Chem. Phys 124, 094505 (2006) · 7 pages, 4 figures, 68 references; 3. version extended following referee advice
arxiv created 2006/01/13 · openalex publication_date 2006/03/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Literature dielectric data of glycerol, propylene carbonate, and ortho-terphenyl show that the measured dielectric relaxation is a decade faster than the Debye expectation but still a decade slower than the breakdown of the shear modulus. From a comparison of time scales, the dielectric relaxation seems to be due to a process which relaxes not only the molecular orientation but also the entropy, the short range order, and the density. On the basis of this finding, we propose an alternative to the Gemant-DiMarzio-Bishop extension of the Debye picture.