High-pressure and temperature dependence of dielectric relaxation in supercooled di-isobutyl phthalate
- 1 October 1996
- journal article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 54 (4), 4008-4010
- https://doi.org/10.1103/physreve.54.4008
Abstract
Results are presented for isothermal, high-pressure (up to p=300 MPa), and temperature (under atmospheric pressure) measurements of complex dielectric permittivity in supercooled di-isobutyl phthalate. The relaxation times determined from the temperature study obey the temperature Vogel-Fulcher-Tammann (VFT) law. The pressure dependence of relaxation times describes the relation τ=exp[B/(p-)]. This equation gives the same ideal glass transition pressure as the generalized VFT formula proposed by Leyser et al. [Phys. Rev. E 51, 5899 (1995)]. For isobaric and isothermal absorption curves, the scaling behavior has been also tested. ©1996 The American Physical Society.
Keywords
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