Figure 6
Spectra of dielectric constant (a) and loss (b) including the α-relaxation peak and the EW region over a temperature range 195–263 K at 7.7 wt% POSS concentration in glycerol. The solid lines are fits with the sum of a HN function48 (Eq. 7) for the α relaxation peak and a CC function44 for the EW relaxation. The fits were performed simultaneously for ε′(ν) and ε″(ν). The dashed lines show the CC contributions for T ≤ 222 K, leading to the EW as explained in the text (at higher temperatures, the EW is outside of the frequency window). For clarity reasons, in frame (a) the EW relaxation is shown for two temperatures only. The inset provides a zoomed view showing the EW contribution for all four temperatures.
