Figure 9 shows the frequency depend

Figure 9 shows the frequency dependence of ε’ and tanδ of all composites at room temperature. For each composite, the dielectric permittivity has shown several partially overlapped dispersion regions indicated by the change in the slope of curves and subsequent jumps in dielectric losses. These low-frequency relaxations of ε’ appearing at low frequencies below 400 kHz in all samples can be referred to defects creating interface polarization owing to the charge accumulation at the boundary between different phases caused by different Maxwell–Wagner polarization mechanism and may be predominating in the total conduction of this family of materials. The relaxation dispersion starting to emerge above 400 kHz is obviously related to the glass transition relaxation of the PVDF matrix [31,32,35].