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首页> 外文期刊>RSC Advances >Ferroelectric relaxation dependence of poly(vinylidene fluoride-co-trifluoroethylene) on frequency and temperature after grafting with poly(methyl methacrylate)
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Ferroelectric relaxation dependence of poly(vinylidene fluoride-co-trifluoroethylene) on frequency and temperature after grafting with poly(methyl methacrylate)

机译：聚（氟乙烯 - 二氟乙烯）与聚（甲基丙烯酸甲酯）嫁接后聚（偏二氟乙烯 - 二氟乙烯）的铁电弛豫依赖性依赖于频率和温度

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摘要

Poly(vinylidene fluoride) (PVDF) based ferroelectric fluoropolymers have attracted considerable attention in high energy density pulse capacitors application for the tunable and tight composition dependence of their ferroelectric performances. Grafting poly(methacrylate esters) (ca. poly(methyl methacrylate) (PMMA)) onto the side chain of P(VDF-TrFE-CTFE) (TrFE refers to trifluoroethyelene and CTFE is chlorotrifluoroethylene) has been shown to be an effective route to tailor the ferroelectric performance of P(VDF-TrFE-CTFE). The resultant grafted copolymers possess advantages including well maintained high energy density and remarkably reduced energy loss. To further disclose the influence of a PMMA side chain on ferroelectric relaxation of a P(VDF-TrFE-CTFE) main chain, a set of P(VDF-TrFE-CTFE)-g-PMMA copolymers bearing PMMA content from 10 wt% to 32 wt% were synthesized and well characterized in this work. The dielectric and energy storage performance of the grafted copolymers were systematically investigated under increased electric field, testing temperature, and frequency. The PMMA side chain was found to exhibit great influence with ferroelectric performance under varied conditions by impeding crystallization and formation of the ferroelectric phase of the P(VDF-TrFE-CTFE) main chain along with increasing the Young's modulus of amorphous phase. As a result, the grafted copolymer with optimized PMMA content shows excellent stability with testing frequency, temperature, and electric field. That allows them to store and discharge energy consistently, which is rather important for energy storage capacitors working under varied conditions. With respect to promising energy storage performances together with low performance dependence during working conditions, the PMMA grafted P(VDF-TrFE-CTFE) copolymer may offer a great candidate material for high energy density pulse capacitors.
机译：聚（偏二氟乙烯）（PVDF）铁电含氟聚合物在高能量密度脉冲电容器中引起了相当大的关注，用于可调谐和紧密的组成依赖性它们的铁电性能。接枝聚（甲基丙烯酸酯）（CA.POY（甲基丙烯酸甲酯）（PMMA））在P（VDF-TRFE-CTFE）的侧链上（TRFE是指三氟乙烯和CTFE是氯丁二乙烯）被证明是有效的定制P的铁电性能（VDF-TRFE-CTFE）。所得的接枝共聚物具有优点，包括良好的保持高能量密度，并且能量损失显着降低。进一步公开了PMMA侧链对P（VDF-TRFE-CTFE）主链铁电弛豫的影响，一组P（VDF-TRFE-CTFE）-G-PMMA共聚物，其含有PMMA含量为10wt％至合成32wt％并在这项工作中具有很好的特征。在增加的电场，测试温度和频率下系统地研究了接枝共聚物的介电和能量存储性能。发现PMMA侧链通过阻碍P（VDF-TRFE-CTFE）主链的结晶和形成杨氏的非晶相模量来表现出不同条件下的铁电性能的巨大影响。结果，具有优化的PMMA含量的接枝共聚物显示出具有测试频率，温度和电场的优异稳定性。这允许它们始终如一地存储和放电，这对于在不同条件下工作的能量存储电容器相当重要。对于在工作条件期间具有低性能依赖性的高性能依赖性的能量存储性能，PMMA接枝的P（VDF-TRFE-CTFE）共聚物可以提供用于高能量密度脉冲电容器的伟大候选材料。

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  • 来源
    《RSC Advances》 |2016年第87期|共13页
  • 作者

    Miao Bei; Liu Jingjing; Zhang Xiao; Lu Junyong; Tan Shaobo; Zhang Zhicheng;

  • 作者单位

    Xi An Jiao Tong Univ Sch Sci MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Sch Sci MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Xian 710049 Peoples R China;

    Naval Univ Engn Natl Key Lab Sci &

    Technol Vessel Integrated Powe Wuhan 430034 Peoples R China;

    Naval Univ Engn Natl Key Lab Sci &

    Technol Vessel Integrated Powe Wuhan 430034 Peoples R China;

    Xi An Jiao Tong Univ Sch Sci MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Sch Sci MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Xian 710049 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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