Simultaneous stretching and static electric field poling of poly(vinylidene fluoride‐hexafluoropropylene) copolymer films
2007
Poly(vinylideneflouride-hexafluoropropylene) (PVDF-HFP) copolymer films were simultaneously stretched and static electric poled (SSSEP) in seriate mode. The experimental results exhibited that SSSEP greatly enhanced the piezoelectric properties of the PVDF-HFP films and slightly increased the dielectric properties of the films. The maximum piezoelectric coefficient d33 24 pC/N higher than the reported was obtained in these films under optimum condition. Based on the wide angle X-ray diffraction results, the SSSEP films showed more organized crystalline structure than the only stretched films. POLYM. ENG. SCI., 47:1630–1633, 2007. © 2007 Society of Plastics Engineers
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