Correlations in a system with complex dynamics

Maria Massalska-Arodz; Jan Krawczyk

doi:10.1117/12.373701

14 December 1999 Correlations in a system with complex dynamics

Maria Massalska-Arodz, Jan Krawczyk

Proceedings Volume 4017, Polymers and Liquid Crystals; (1999) https://doi.org/10.1117/12.373701
Event: International Conference on Dielectric and Related Phenomena '98, 1998, Szczyrk, Poland

Abstract

The (alpha) -relaxation connected with reorientations of elongated molecules around the short axes was extracted using Cole-Davidson formula from the process observed in the isotropic and cholesteric phase of isopentycyanobiphenyl at the frequency range from 0.1 Hz to 100 kHz. Description gives the following parameters pointing to non-Debye and non-Arrhenius features of the process: the Jonscher parameters n₁ approximately equals 0.5 and n₂ equals 1, fragility m equals 50, exponent of the Kohlrausch-Williams-Watts relaxation function (beta) equals 0.7-0.87 and T₀ equals 172 K from the Vogel-Fulcher-Tamman equation. The data obeys the scaling relation proposed in 1990 by group of Nagel.

Citation Download Citation

Maria Massalska-Arodz and Jan Krawczyk "Correlations in a system with complex dynamics", Proc. SPIE 4017, Polymers and Liquid Crystals, (14 December 1999); https://doi.org/10.1117/12.373701

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