Physical properties and β‐phase increment of AgNO₃‐filled poly(vinylidene fluoride) films

Abstract

X-ray diffraction (XRD), infrared (IR) transmition and optical absorption (OA) spectra, differential thermal analysis (DTA), dc electrical resistivity (ρ), magnetic susceptibility (χ) and electron spin resonance (ESR) of AgNO 3 -filled poly(vinylidene fluoride) (PVDF) films, were measured over the filler mass fraction range 0.001 ≤ W ≤ 15%. XRD and IR analysis evidenced the increase of α-and β-PVDF crystalline phases due to the AgNO 3 filler. The maximum crystallinity increment was found at W = 0.5%. Three endothermic peaks were detected by DTA, and were attributed subsequently to: the first order para-para-electric phase transition, the first-order ferro-para-electric phase transition and the melting. The melting peak was used to calculate the order of reaction and the activation energy of melting. The observed OA peaks and/or plateau were attributed to the charge-transfer complex formed mainly by the AgNO 3 filler. This assumption was supported by the diamagnetic susceptibility detected for the present system. The temperature dependence of ρ was explored according to a previously proposed one-dimensional interpolaron-hopping model. The hopping distance was formulated numerically as a function of temperature and filling level. The ESR findings were attributed to the roles of AgNO 3 and dimethylformamide solvent in complex formation.

Spectroscopic and thermal investigations of poly(vinylidene fluoride) films composites with LaNi3Co2

“…These results data accords with FTIR and X-ray finding. The activation energy, E, was estimated from Arrhenius equation [24] using the melting peaks. The FL dependence of E is shown in figure 8.…”

Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

“…Many authors reported improvements in the dielectric constant of nanocomposites composed of PVDF, as well as other polymers, and various inorganic nanoparticle fillers [3,12,19,26,27,[29][30][31][32][33][34][35][36][37]. Some of these studies reported on nanocomposites containing PVDF and silver nanoparticles [12,19,29,30,36].…”

“…Some of these studies reported on nanocomposites containing PVDF and silver nanoparticles [12,19,29,30,36].…”

Effect of NaCl filler on ferroelectric phase and polaron configurations of PVDF films

“…Recent investigations of our research group revealed that the metal halide fillers modify significantly the structure and physical properties of PVDF films [10][11][12]. NaCl is known as an active solvent [13] for some polymers which can be used to form blends with PVDF.…”