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Degradation of the dielectric and piezoelectric response of β-poly(vinylidene fluoride) after temperature annealing

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Abstract

The effect of annealing temperature and time on the dielectric and piezoelectric response of poly(vinylidene fluoride), PVDF, was studied. The observed decrease in the value of the dielectric, ε′, and piezoelectric, d 33, constants is related to depoling of the material and not to variations of the degree of crystallinity or the electroactive β-phase content. In a general way, the dielectric and piezoelectric responses decrease strongly in the first 4 h at a given temperature, in particular for temperatures higher that 80 °C, reaching stable values for longer annealing times. For most applications, the temperature of 100 °C will set the limit of suitable performance. Nevertheless, the material still retains a stable piezoelectric response of ca. 4 pC/N after reaching temperatures of 140 °C. The mechanisms behind the observed behavior are discussed.

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Acknowledgements

The authors thank the Portuguese Foundation for Science and Technology (FCT) for financial support under grants PTDC/CTM/73030/2006 and NANO/NMed-SD/0156/2007. V.S. thanks the FCT for the SFRH/BPD/63148/2009 grant.

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Authors and Affiliations

  1. Centro/Departamento de Física da Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    M. P. Silva, V. Sencadas & S. Lanceros-Méndez

  2. CeNTI - Centre for Nanotechnology and Smart Materials, Rua Fernando Mesquita, 2785, 4760-034, Vila Nova de Famalicão, Portugal

    C. M. Costa

  3. IPC – Institute for Polymers and Composites, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal

    A. J. Paleo

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  1. M. P. Silva
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  2. C. M. Costa
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  3. V. Sencadas
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  4. A. J. Paleo
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  5. S. Lanceros-Méndez
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Correspondence to S. Lanceros-Méndez.

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Silva, M.P., Costa, C.M., Sencadas, V. et al. Degradation of the dielectric and piezoelectric response of β-poly(vinylidene fluoride) after temperature annealing. J Polym Res 18, 1451–1457 (2011). https://doi.org/10.1007/s10965-010-9550-x

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  • DOI: https://doi.org/10.1007/s10965-010-9550-x

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