Preparation and assessment of piezo- and pyroelectric poly (vinylidene fluoride-hexafluoropropylene) copolymer films

Characterization, performance and optimization of PVDF as a piezoelectric film for advanced space mirror concepts.

“…It was found that samples kept at 150 °C for 5 minutes still exhibited 30-40% of their original pyroelectric effect. After the annealing step, no further decay of the pyroelectric coefficient was observed during storage at 120 °C for several hours [26]. However, no longterm aging experiments have been reported.…”

“…Like the PVDF homopolymer, it must be stretched to obtain the polar β-phase. Solvent-cast films of P(VDF-HFP) which were stretched and poled have been examined for pyroelectric stability [26]. It was found that samples kept at 150 °C for 5 minutes still exhibited 30-40% of their original pyroelectric effect.…”

Enhanced piezoelectric performance from carbon fluoropolymer nanocomposites

“…24 A quasi-static experimental setup ( Figure 2) was used for piezoelectric measurements in which samples were fixed from the top and a 47 g mass was suspended from the bottom, pulling the sample along its length. 12 A force of 0.46 N was applied with a constant period of 10 ms. Leads were attached to the surface electrodes, and connected to a Rigol oscilloscope to monitor the resulting voltage, with a capacitor in parallel.…”

“…10 The discovery of piezoelectric polymers offers a relatively new class of elastically compliant, low dielectric materials, referred to as electroactive polymers (EAPs). [12][13][14] EAPs have been incorporated into a broad range of applications such as actuators, integrated microelectromechanical systems, sensors, ultrasonic imaging, and ferroelectric memory devices. 15 However, low voltage and force generation capabilities have greatly limited their application.…”

PZT / P(VDF-HFP) 0–3 composites: Preparation, electrical poling and piezoelectric properties

“…Often piezo-and pyroelectric polymers such as polyvinylidene fluoride (PVDF) and its copolymer with trifluoroethylene (P(VDF-TrFE)) were used as matrix in order to embed ferroelectric particles such as lead zirconate titanate (PZT) or barium titanate (BaTiO 3 ). Especially within the last decade, poly(vinylidene fluoridehexafluoropropylene) (P(VDF-HFP)), as another PVDF copolymer, was studied regarding its electro-active properties [3,4]. However, the overall advantages of P(VDF-HFP) are a very good material availability, good processing possibilities of at least non-polar films and a relatively low elastic stiffness of about 0.5 GPa.…”