Piezoelectricity in γ-form Nylon 11

Abstract
X‐ray studies of unpoled and poled γ‐form Nylon 11 films indicate that the polarization mechanism is not due to a field‐induced crystal transformation from the γ to the α form, suggesting the existence of a polar γ form. The temperature dependence of d31 shows no decrease in polarization at the α‐γ transition temperature (∼95 °C), indicating that the hydrogen bonds in the poled film are not able to randomize. These results suggest the possibility that our understanding of the γ‐form structure of Nylon 11 is incomplete.

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