Poly(vinylidene fluoride) (PVDF) films filled with BiCl 3 in the mass fraction range of 0.1 W 10 were prepared. a-and b-Crystalline PVDF phases were detected and characterized by spectroscopic analysis. Fourier transform infrared analysis detected the presence of a-and bphase head-to-head and tail-to-tail polymer chain defects. The band detected at 1670 cm À1 was assigned to C¼ ¼C, indicating polarons in the polymeric matrix. The degree of crystallinity increased by increasing the filling level (FL), and the maximum relative b-phase content was found at w ¼ 5% FL. This result was confirmed by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis. The Xray analysis confirmed the presence of a and b phases, and no peaks corresponding to pure BiCl 3 were found. DSC therograms showed a sharp endothermic peak at T 1 ¼ 444 K for different FLs because of the melting. This peak was used to calculate the activation energy and the order of the reaction. The DC electrical resistivity was attributed to the onedimensional interpolaron hopping mechanism. The FL dependence of log r and hopping distance (R o ) at 373 K was observed, indicating the FL affected the distribution of the hopping sites.

Poly(vinylidene fluoride) (PVDF) and LaNi 3 Co 2 were composites in various combinations by using melting technique. Morphological and physical properties of both the surface and interface of poly(vinylidene fluoride)/ LaNi 3 Co 2 composite films have been investigated. FTIR and XRD diffraction analysis evidenced the increase of α, β and γ-PVDF crystalline phases. The bands at 888 and 1414 cm -1 were assigned to γ-phase of PVDF. Maximum value of the relative amount of β-phase was observed at 35 and 60 % FL. This result was confirmed by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis. Maximum value of degree of crystallinity was observed at 15% Filling level (FL). Morphology of SEM consists of two different size rings and spherulites. DSC was used to identify the melting temperature, the order of reaction and the activation energy of melting. A sharp endothermic peak at T m ≈ 444 K due to melting and T 2 ≈ 360 K due to α-relaxation/transition. Maximum values of magnetoresistance (MR) observed from range (243 to 238K) are due to reorientation of dipoles in a process associated with the glass transition temperature of PVDF.