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

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI:10.1109/CEIDP55452.2022.9985290

Ji Xiaoyu, Liu Yongbin, Yuan Ni, Xi Baofeng, Gao Jinghui, Zhong Lisheng

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Abstract

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.

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共混增强P(VDF-TrFE)压电性温度稳定性的研究

本文的主要工作是通过将聚偏氟乙烯-三氟乙烯(P(VDF-TrFE))与四种不同质量比的聚甲基丙烯酸甲酯(PMMA)共混制备压电薄膜，从而提高压电的温度稳定性。首先，通过动态力学分析(DMA)测试，可以看出两种聚合物的相容性良好，玻璃化转变温度随着PMMA质量的增加而升高。然后，通过x射线衍射仪(XRD)、阻抗分析仪、磁滞回线等相关实验分析了压电薄膜各参数的变化。最后，测量了共混膜极化后压电常数随温度的变化。PMMA的加入使材料的介电常数和压电常数略有降低，但压电常数的温度稳定性得到了显著提高，这可能是由于空间约束效应造成的刚性结构的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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