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首页> 外文期刊>Journal of Applied Polymer Science >Strengthening of electromechanical properties for poly(vinylidene fluoride-trifluoroethylene) films under tailored electric cycling
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Strengthening of electromechanical properties for poly(vinylidene fluoride-trifluoroethylene) films under tailored electric cycling

机译：在定制电动循环下的聚（偏二氟乙烯 - 三氟乙烯）膜的机电性能

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摘要

Copolymers of polyvinylidene fluoride and trifluorethylene [P(VDF-TrFE)] have potential applications in wearable and implantable electromechanical devices since they are mechanically flexible, and biocompatible. A tailored electric cyclic process is employed to enhance both electrical and mechanical properties in P(VDF-TrFE) 65/35 mol % copolymer films. The films are subjected to lower and higher field magnitude electric cycling successively. For electrical properties, enhancement in remnant polarization, dielectric and piezoelectric constants occurs. From mechanical point of view, strengthening in the fracture strength happens. Wide-angle X-ray diffraction techniques examine changes of the orientation of the molecular chains, grain size, and crystallinity after electric cycling for the copolymer films. Scanning electron microscopy reveals evolutions of the microstructure, including rod-like textures and fractography of the films. The results indicate that electric cycling causes the molecular chains to orient gradually along the direction perpendicular to the applied electric field. Consequently, an enhancement of 12.2% and 45% is realized for the remnant polarization and fracture strength, respectively for P(VDF-TrFE) 65/35 copolymer film. (C) 2017 Wiley Periodicals, Inc.
机译：聚偏二氟乙烯和三氟乙烯的共聚物[P（VDF-TRFE）]具有可穿戴和可植入机电装置的潜在应用，因为它们是机械柔性的，并且生物相容性。使用定制的电动环循环过程来增强P（VDF-TRFE）65/35mol％共聚物膜中的电气和机械性能。薄膜连续地经受较低和更高的场幅度电动循环。对于电性能，发生延伸偏振，电介质和压电常数的增强。从机械的角度来看，骨折强度的加强发生。广角X射线衍射技术检查用于共聚物膜后电循环后的分子链，晶粒尺寸和结晶度的取向的变化。扫描电子显微镜显示显微结构的演进，包括胶片状纹理和薄膜的断裂。结果表明，电动循环使得分子链沿垂直于施加的电场的方向逐渐定向。因此，对于P（VDF-TRFE）65/35共聚物膜，分别实现了12.2％和45％的增强12.2％和45％的裂缝强度。 （c）2017 Wiley期刊，Inc。

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