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Investigation of relaxation process in poly(vinylidene fluoride–hexafluoropropylene) using dielectric relaxation spectroscopy

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Abstract

Dielectric relaxation behavior of poly(vinylidene fluoride–hexafluoropropylene) [P(VDF–HFP)] is investigated on the basis of dielectric relaxation spectroscopy at 20–200 °C and 20–5 MHz after conversion to complex electric modulus formalism. It is found that imaginary modulus spectra exhibit asymmetry peak with peak-width much broader than that of the Debye peak. The peaks are skewed toward the high frequency sides due to the effect of the conductivity. The complex electric modulus data have been fitted using non-exponent Kohlrausch–Williams–Watts and Cole–Cole functions. The results show that the non-exponent parameter (β) and the shape parameter (α) are all lower than idealized Debye-type, indicating a wide relaxation distribution of P(VDF–HFP). Both the activation energies Ea from \({\text{M}}^{\prime \prime }\) spectra and conductivity are all due to the contribution of dc and ac conductive relaxation process.

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Acknowledgments

This work was funded by National Basic Research Program of China (“973” Program No. 2010CB71600) and Natural Science Foundations of Hebei province of China (E2012203153).

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Authors and Affiliations

  1. State Key Laboratory of Metastable Materials Science and Technology, College of materials Science and Engineering, Yanshan University, Qinhuangdao, 066004, People’s Republic of China

    Xiaojia Zhao, Guirong Peng, Xubo Jiang, Wenpei Liu, Zaiji Zhan, Weina Meng, Yucui Wang, Tianxin Song, Jin Li & Haiyue Feng

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  1. Xiaojia Zhao
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  2. Guirong Peng
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  3. Xubo Jiang
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  4. Wenpei Liu
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  7. Yucui Wang
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  9. Jin Li
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Correspondence to Guirong Peng or Zaiji Zhan.

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Zhao, X., Peng, G., Jiang, X. et al. Investigation of relaxation process in poly(vinylidene fluoride–hexafluoropropylene) using dielectric relaxation spectroscopy. J Mater Sci: Mater Electron 27, 718–723 (2016). https://doi.org/10.1007/s10854-015-3808-3

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