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A critical analysis of the alpha, beta and gamma phases in poly(vinylidene fluoride) using FTIR

机译：使用FTIR对聚（偏二氟乙烯氟乙烯）中的α，β和γ相的关键分析

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摘要

Poly(vinylidene fluoride) (PVDF) has been widely utilized in scientific research and the manufacturing industry for its unique piezoelectric properties. In the past few decades, the vibrational spectra of PVDF polymorphic polymers via FTIR (Fourier transform infrared spectroscopy) have been extensively investigated and documented. However, reports on the analysis of alpha, beta and gamma phases often have conflicting views based on measured data. In this work, we analyze the FTIR vibrational bands of PVDF materials fabricated by different processes with detailed XRD (X-ray diffraction) characterization to identify the structural a, b and g phases. By examining the results in this work and extensively reviewing published research reports in the literature, a universal phase identification procedure using only the FTIR results is proposed and validated. Specifically, this procedure can differentiate the three phases by checking the bands around 763 and/or 614, 1275, and 1234 cm(-1) for the alpha, beta and gamma phases, respectively. The rule for assignment of the 840* and 510* cm(-1) bands is provided for the first time and an integrated quantification methodology for individual beta and gamma phase in mixed systems is also demonstrated.
机译：聚偏氟乙烯（PVDF）已被广泛应用在科研和制造业以其独特的压电性能。在过去的几十年中，PVDF多态聚合物的FTIR经由振动光谱（傅立叶变换红外光谱法）已经被广泛地研究和记录。然而，在阿尔法的分析报告，β和γ相通常具有冲突的基于测量的数据视图。在这项工作中，我们分析PVDF材料的FTIR振动带制造通过与详述XRD（X射线衍射）表征不同的过程，以确定所述结构的a，b和g相。通过检查这项工作的成果和广泛的审查文学发表研究报告，仅使用FTIR结果的普遍性相鉴别过程，提出并验证。具体地，该过程可以通过检查周围763和/或614，1275的频带区分三个阶段，和1234厘米（-1）为α，β和γ相，分别。提供了一种用于在840 *的分配和510 *厘米（-1）频带中的规则的第一次和各个β和在混合系统的γ相集成的量化方法也被证实。

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  • 来源
    《RSC Advances》 |2017年第25期|共8页
  • 作者

    Cai Xiaomei; Lei Tingping; Sun Daoheng; Lin Liwei;

  • 作者单位

    Jimei Univ Sch Sci Xiamen 361021 Peoples R China;

    Huaqiao Univ Fujian Key Lab Special Energy Mfg Xiamen 361021 Peoples R China;

    Xiamen Univ Sch Aerosp Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Sch Aerosp Engn Xiamen 361005 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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