Annealing Effect on Chain Segment Motion and Charge Trapping and Detrapping in Nylon 1010

The chain segment motion and charge trapping and detrapping in nylon 1010 films were investigated by means of thermally stimulated depolarization current (TSDC). There were three current peaks (named alpha, rho 1, and rho 2 peaks, respectively) in the experimental TSDC spectra above room temperature. The alpha peak is attributed to a background dipole relaxation by the motion of chain segments and space charge contribution, the rho 1 peak is originated from a space charge trapped in the bulk amorphous regions and the interphase between crystalline and amorphous regions, the rho 2 peak is originated from space charge trapped in crystalline regions. By analyzing the characteristic parameters of these peaks, it was found that with in increase of the degree of crystallinity the activation energy of the a peak increased from 1.12 to 1.22 eV and the trap depth of the rho 2 peak increased from 2.70 to 2.82 eV, while the trap depth of the rho 1 peak decreased from 1.50 to 1.29 eV. Annealing induced a decrease of the chain segment mobility and promoted the creation of traps in nylon 1010. Annealing also decreased the stability of the trapped charges in the bulk amorphous and the interphase regions and increased the stability of the trapped charges in the crystalline regions.