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首页> 外文期刊>Journal of Applied Polymer Science >Tailored Ferroelectric Responses and Enhanced Energy Density in PVDF-Based Homopolymer/Terpolymer Blends
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Tailored Ferroelectric Responses and Enhanced Energy Density in PVDF-Based Homopolymer/Terpolymer Blends

机译：基于PVDF的均聚物/三元共聚物共混物的定制铁电响应和增强的能量密度

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摘要

Blend of polymers is an effective way to tailor the ferroelectric responses and improve the energy storage properties of polymers. In this work, the microstructure and dielectric responses of the blends of poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] have been studied. It is found that the addition of PVDF disturbs the crystallization process of P(VDF-TrFE-CFE), leading to lower crystallinity and smaller crystalline size. The aforementioned microstructure changes result in tailored ferroelectric responses. Dielectric responses show that the blend with 10 wt % PVDF achieves larger polarization response under high electric field (above 300 MV/m) due to the interfacial polarization. Because of the tailoring effect and the interfacial polarization, the blend with 10 wt % PVDF exhibits higher energy density and efficiency. Moreover, the breakdown strength (Eb) is also improved by adding a small amount of PVDF into the terpolymer. VC 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40994.
机译：聚合物共混物是调整铁电响应并改善聚合物储能性能的有效方法。在这项工作中，研究了聚偏二氟乙烯（PVDF）和聚偏二氟乙烯-三氟乙烯-氯氟乙烯[P（VDF-TrFE-CFE）]的共混物的微观结构和介电响应。发现添加PVDF会干扰P（VDF-TrFE-CFE）的结晶过程，导致较低的结晶度和较小的晶体尺寸。前述的微观结构变化导致定制的铁电响应。介电响应表明，由于界面极化，具有10 wt％PVDF的共混物在高电场（高于300 MV / m）下可获得更大的极化响应。由于修整效果和界面极化，具有10 wt％PVDF的共混物显示出更高的能量密度和效率。此外，通过向三元共聚物中添加少量的PVDF，还提高了击穿强度（Eb）。 VC 2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2014，131，40994。

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