Abstract
A study of the effect of absorbed water on the piezoelectric properties of Nylon 11 and Nylon 7 films has been carried out. Films were prepared by slow cooling from the melt or by quenching rapidly into ice water. Poled films were soaked in distilledde-ionized water and the piezoelectric strain coefficientd 31, piezoelectric stress coefficiente 31, dielectric constantɛ, and elastic modulusc measured continuously as the films dried out in a stream of dry nitrogen gas. The results obtained show that the piezoelectric response of poled Nylon 11 and Nylon 7 films is sensitive to adsorbed water, the sensitivity being greater for Nylon 7 than for Nylon 11. These observations are discussed in terms of the effect of water on molecular relaxation of these polymers.
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Newman, B.A., Kim, K.G. & Scheinbeim, J.I. Effect of water content on the piezoelectric properties of nylon 11 and nylon 7. J Mater Sci 25, 1779–1783 (1990). https://doi.org/10.1007/BF01045384
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DOI: https://doi.org/10.1007/BF01045384