Electrical conduction in Kapton polyimide film at high electrical fields

TSDC spectroscopy of relaxational and interfacial phenomena

“…Polymers with imide [338][339][340]343,[345][346][347][348][349][350][351][352]) and amide [351,353] structures (which are of interest from a practical point of view), demonstrate certain regularities in their relaxation phenomena. The much larger polarity and polarisability of C-N and N-H bonds in comparison with C-C and C-H provide the relaxation effects of several mechanisms.…”

The use of the final thermally stimulated discharge current technique to study the molecular movements around glass transition

“…The data in Figs. [4][5][6][7] show that in the temperature range from 370 to 470 K the β 2 relaxation is entering. For the β relaxation various mechanisms have been proposed involving motions that, while still essentially local in character, encompass larger portions of the repeat unit that respond in a correlated manner.…”

“…PI is a hydrophilic polymer and its dielectric properties largely depend upon absorbed water or humidity [4][5][6]. A good deal of work on electrical conduction in PI at low fields [7][8][9][10][11] and high fields [6,12] has been reported. The work on conduction phenomena in PI has been revised in [3].…”

Plasma fluorination of polyimide thin films

“…In this case, the reduction of leakage current can be explained by the reduced concentration of conductive ions in the polyimide from 11 ϫ10 15 atoms/cm 3 to 2.4ϫ10 15 atoms/cm 3 due to the plasma fluorination. In fact, the ionic conduction of polyimide has been described, [20][21][22] in terms of protons (H ϩ ) in the polyimide that act as carriers for ionic conduction. This suggests that the leakage current was reduced by hydrogen ions combining with fluorine atoms to form HF.…”