Enhancement on Temperature Stability of Piezoelectricity of P(VDF-TrFE) via Blending

In this paper, The main work is to prepare piezoelectric films via blending Poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) with four different mass ratios of ploy(methyl-methacrylate) (PMMA), thereby improving the temperature stability of piezoelectricity. First, through the Dynamic mechanical analysis (DMA) test, it can be seen that the compatibility of the two polymers is good, and the glass transition temperature is increased with the increase mass of PMMA. Then, the changes of various parameters of the piezoelectric film were analyzed by X-Ray Diffraction (XRD), Impedance analyzer, hysteresis loop and other related experiments. Finally, the vary of piezoelectric constant with temperature was measured after the blend film was polarized. The temperature stability of the piezoelectric constant is remarkably enhanced with PMMA though the dielectric constant and piezoelectric constant show slightly reduced, which should be ascribed to the rigid structure origin from spatial confinement effect.