Piezoelectricity in nylon 5,7

P. E. Dunn*, Stephen Howard Carr

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The authors have investigated nylon 5,7 as a piezoelectric polymer which can potentially exhibit very high activity. Nylon 5,7 is synthesized using improved procedures, and the product polymer is characterized by X-ray diffraction, calorimetry, and the thermally stimulated current. Films are prepared by quenching from the melt. The piezoelectric response is compared to that of other polyamides. Initial measurements a field strength of 175 kV/cm resulted in a piezoelectric strain coefficient d31 = 0.4 pC/N. By comparison, d31 values in the literature for nylon 11 and nylon 9 at 400 kV/cm are 0.6 and 1.1 pC/N, respectively (film-forming conditions, poling time, and temperature being the same). This indicates that at an equivalent field strength, nylon 5,7 could surpass the piezoelectric activity of nylon 9 and verify the theoretical prediction of increased activity in the lower, odd nylons.

Original languageEnglish (US)
Title of host publicationProc 6th Int Symp Electrets (ISE 6)
EditorsD.K. Das-Gupta, A.W. Pattullo
PublisherPubl by IEEE
Number of pages5
StatePublished - Dec 1 1988
EventProceedings of the 6th International Symposium on Electrets (ISE 6) - Oxford, England
Duration: Sep 1 1988Sep 3 1988


OtherProceedings of the 6th International Symposium on Electrets (ISE 6)
CityOxford, England

ASJC Scopus subject areas

  • Engineering(all)


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