Ordering effect on dynamics in glass-forming mixture of liquid crystals

作者: M. Mierzwa , M. Paluch , S. J. Rzoska , J. Zioło , U. Maschke

DOI: 10.1007/978-1-4020-5872-1_13

关键词:

摘要: Relaxation dynamics in glass-forming mixture of liquid crystals (E7) is studied by means dielectric spectroscopy the frequency range from 10−2 up to 109Hz and over temperature 200 373K. We analyzed both shape relaxation spectra dependencies behavior observed nematic phase. The dominant process exhibits nearly Debye form that depends on clearly non– Arrhenius fashion. also show second distingue which related α-relaxation. Additionally, we carried out measurements mechanical relaxation. As a result it was found times correspond α-relaxation times.

参考文章(24)
D. Demus, J. Goodby, G. W. Gray, H.‐W. Spiess, V. Vill, Handbook of liquid crystals Wiley-VCH Verlag GmbH. ,(1998) , 10.1002/9783527620555
G. Vertogen, W. H. de Jeu, Thermotropic liquid crystals, fundamentals ,(1988)
H. R. Zeller, Dielectric Relaxation and the Glass Transition in Nematic Liquid Crystals Physical Review Letters. ,vol. 48, pp. 334- 337 ,(1982) , 10.1103/PHYSREVLETT.48.334
J. Jadzyn, L. Hellemans, G. Czechowski, C. Legrand, R. Douali, Dielectric and viscous properties of 6CHBT in the isotropic and nematic phases Liquid Crystals. ,vol. 27, pp. 613- 619 ,(2000) , 10.1080/026782900202453
Legess Senbetu, Chia-Wei Woo, Isotropic-Nematic Transition: Landau-de Gennes vs Molecular Theory Molecular Crystals and Liquid Crystals. ,vol. 84, pp. 101- 124 ,(1982) , 10.1080/00268948208072135
L. Benguigui, Dielectric relaxation and nematic order in liquid crystals Physical Review A. ,vol. 29, pp. 2968- 2970 ,(1984) , 10.1103/PHYSREVA.29.2968
Aleksandra Drozd-Rzoska, Sylwester J. Rzoska, Jerzy Zioło, Critical behavior of dielectric permittivity in the isotropic phase of nematogens Physical Review E. ,vol. 54, pp. 6452- 6456 ,(1996) , 10.1103/PHYSREVE.54.6452
Aleksandra Drozd-Rzoska, Sylwester J. Rzoska, Jerzy Zioło, Quasicritical behavior of dielectric permittivity in the isotropic phase of smectogenic n-cyanobiphenyls Physical Review E. ,vol. 61, pp. 5349- 5354 ,(2000) , 10.1103/PHYSREVE.61.5349
S. Urban, H. Kresse, R. Dąbrowski, Low Frequency Dielectric Relaxation Process in Liquid Crystals with Nematic and Liquid-Like Smectic Phases Zeitschrift für Naturforschung A. ,vol. 52, pp. 403- 408 ,(1997) , 10.1515/ZNA-1997-0505