Molecular Dynamics of 4-Cyano-3-Fluorophenyl 4-Butylbenzoate as Studied by Dielectric Relaxation Spectroscopy |
| M. Massalska Arodźa, J. Krawczyka, E. Juszyńskaa, b, A. Kocotc and A. Inabab
a Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland b Research Center for Structural Thermodynamics, Osaka University, Toyonaka, Japan c Institute of Physics, Silesian University, Katowice, Poland |
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| Dielectric α-relaxation connected with reorientations of the 4-cyano 3-fluorophenyl 4-butylbenzoate molecules around short axes in the isotropic and nematic phases is presented. In the nematic phase the super Arrhenius temperature dependence of the relaxation has been found. Vitrification of the supercooled nematic phase is shown. Below glass transition temperature the secondary β-relaxation has been identified and described well by the Arrhenius temperature dependence on cooling and on heating. After softening of glass to the metastable nematic phase a spontaneous crystallization occurs as for some other low weight molecular glass formers. |
| DOI: 10.12693/APhysPolA.117.532 PACS numbers: 64.70.kj, 64.70.M-, 77.22Gm |