Dielectric relaxation of Sorbitol revisited

Christer Svanberg (1) , Rikard Bergman (1)

1 Applied Physics

We have performed broad-band dielectric spectroscopy to study the merging of the alpha- and beta-relaxations in Sorbitol. To investigate this merging in detail the data were analysed both directly in frequency domain and after transforming the data to time domain. At the liquid-glass transition temperature, Tg, the standard analysis give a clear kink in the temperature dependence of the relaxation time of the beta-relaxation. However, using a more sophisticated analysis we show that the data can be equally well described by extrapolating the low temperature Arrhenius behaviour of the beta-relaxation to the merging region of the alpha- and beta-relaxations. The Sorbitol data is thus compatible with a scenario with no anomalous temperature behaviour in the merging region.

Mots clés: Physical Sciences

Christer Svanberg, Rikard Bergman. Dielectric relaxation of Sorbitol revisited. Philosophical Magazine, 2007, 87 (3-5), pp.383-388. ⟨10.1080/14786430600990345⟩. ⟨hal-00513773⟩