Dielectric properties of liquid-crystal azomethine polymer with a side alkyl-substituted chain, doped with fullerene C$_{60}$

We studied the actual and imaginary components of the dielectric constant of liquid-crystal azomethine polymer with a side chain, doped with 0.5 wt % of fullerene C$_{60}$, over a wide range of temperatures and frequencies; measurements were made by means of dielectric spectroscopy. By analyzing the frequency dependence of the dielectric constant, we detected the relaxation processes ($\alpha$, $\beta_{1}$, and $\beta_{2}$) in the nanocomposite, corresponding to certain modes of molecular motion and described them by the Arrhenius equations ($\beta_{1}$- and $\beta_{2}$-processes) and the Vogel–Fulcher–Tamman equation ($\alpha$-process). An antiplasticization effect is discovered after doping the polymer with fullerene C$_{60}$, which manifests itself in increasing the glass transition temperature of the nanocomposite compared to this parameter typical of pure polymer.