Investigation of Relaxation Process of Nylon 1212 Using Dielectric Relaxation Spectroscopy

摘要

The relaxation processes of α-form nylon 1212 from 50℃ up to 160℃ were studied by dielectric relaxation spectroscopy (DRS) in a wide frequency range of 63 Hz to 5 MHz. The α relaxation, the electrode relaxation, and the conductivity relaxation of nylon 1212 were observed and analyzed in detail using permittivity and modulus formalism. Electrode polarization and dc conductivity were the origin of high dielectric permittivity values at low frequencies and high temperatures. The strength of the imaginary part of the electric modulus of conductivity relaxation M"_(max) was nearly independent of temperature. The distribution of local conductivity and relaxation time became broader with decreasing temperature.