Abstract
The structure of nylon 39 in the presence of an electric field was investigated by infrared spectroscopy. The vibration peak of the N-H groups in nylon 39 in the presence of direct and alternative current shifted to a higher wavenumber, which was also observed in the infrared spectra of nylon 39 at higher temperatures. A very large dielectric constant for nylon 39 (2000 at 180℃) and remanent polarization were revealed by the dielectric relaxation spectra and displacement-electric hysteresis loops, respectively. These dielectric properties cannot be explained only by the arrangement of the dipole moments of N-H in nylon 39.The change in the infrared spectra and unique electric properties can be explained by the partial dissociation of the hydrogen bonds and the ionization of the amide groups in nylon 39.
