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Absorbed water in the cork structure. A study by thermally stimulated currents, dielectric relaxation spectroscopy, isothermal depolarization experiments and differential scanning calorimetry

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Abstract

This paper reports on a modification of the dielectric properties of cork which occurs as a consequence of heating above 60° C or evacuation for several days. This phenomenon was observed using different experimental techniques (thermally stimulated currents, dielectric relaxation spectroscopy, isothermal depolarization experiments and differential scanning calorimetry), and the corresponding kinetics were analysed. It was observed that the original properties of cork were recovered if the sample was exposed to room air for several weeks. It is suggested that the reported modification of the dielectric properties arises from desorption, induced by heating or evacuation, of water molecules absorbed in the cork structure.

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References

  1. J. F. Mano, N. T. Correia, J. J. Moura-Ramos and B. Saramago, J. Mater. Sci. 30 (1995) 2035.

    Article  CAS  Google Scholar 

  2. A. B. Dias, J. J. Moura-Ramos and G. Williams, Polymer 35 (1994) 1253.

    Article  CAS  Google Scholar 

  3. A. B. Dias, N. T. Correia, J. J. Moura-Ramos and A. C. Fernandes, Polym. Int. 33 (1994) 293.

    Article  CAS  Google Scholar 

  4. B. Jones, D. Tidy and G. Williams, J. Phys. Ed. 9 (1976) 693.

    Google Scholar 

  5. N. G. McCrum, B. E. Read and G. Williams, “Anelastic and dielectric effects in polymer solids” (Dover Publications, New York, 1991) Ch. 7.

    Google Scholar 

  6. N. E. Hill, W. E. Vaughan, A. H. Price and M. Davies, “Dielectric properties and molecular behaviour” (Van Nostrand Reinhold, London, 1969) p. 110.

    Google Scholar 

  7. A. Brather, Colloid Polym. Sci. 257 (1979) 467; 785.

    CAS  Google Scholar 

  8. J. L. Gomez-Ribellez and R. Diaz-Calleja, J. Polym. Sci., Polym. Phys. Ed. 23 (1985) 1505.

    Google Scholar 

  9. B. V. Hamon, Proc. Inst. Elec. Eng., Monograph 7, Part IV (1952) 99.

    Google Scholar 

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Dionísio, M.S.C., Correia, N.T., Mano, J.F. et al. Absorbed water in the cork structure. A study by thermally stimulated currents, dielectric relaxation spectroscopy, isothermal depolarization experiments and differential scanning calorimetry. JOURNAL OF MATERIALS SCIENCE 30, 4394–4400 (1995). https://doi.org/10.1007/BF00361523

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  • DOI: https://doi.org/10.1007/BF00361523

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