A new interpretation of dielectric data in molecular glass formers
arXiv:cond-mat/0511396 · doi:10.1063/1.2176618
Abstract
Literature dielectric data of glycerol, propylene carbonate and ortho-terphenyl (OTP) 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 the entropy, the short-range order and the density as well. On the basis of this finding, we propose an alternative to the Gemant-DiMarzio-Bishop extension of the Debye picture.
arXiv comment7 pages, 4 figures, 68 references; 3. version extended following referee advice
References in corpus (7)
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Cited by in corpus (5)
- Broadband dielectric spectroscopy on benzophenone: alpha relaxation, beta relaxation, and mode coupling theory
- Dielectric and conductivity relaxation in mixtures of glycerol with LiCl
- Mechanical and dielectric relaxation spectra in seven highly viscous glass formers
- An Eshelby model for the highly viscous flow
- Dielectric and thermal relaxation in the energy landscape