Dielectric relaxation studies in liquid crystal polymers by thermally stimulated depolarization current method

The thermally stimulated depolarization current method and the thermally stimulated polarization current method have been used for the study of the star poly (γ-stearyl-α, L-glutamate) polymer. The β peak appears around -88°C and is determined by side-dipole moments. Three other peaks appear: α₁, α₁´, and α₂. The activation energy was determined for β and α₂ peaks for different heating rates. A good correlation between heating rate and T _m² was found. The position of the α₂ peak is very close to that determined by DSC thermograms. The α₁ and α₁´ peaks are strongly influenced by the thermal treatment