Title :
Nature of new τ-peak in thermally stimulated current spectra of PET electrets
Author :
Zhang, Xingyuan ; Zhou, Yigin ; Zhang, Jixiang
Author_Institution :
Dept. of Appl. Chem., Univ. of Sci. & Technol. of China, Hefei, China
Abstract :
A new current peak, the τ-peak, whose appearance temperature is higher than that of the ρ-peak, is found from TSC (thermally stimulated current) spectra of PET (polyethylene terephthalate) electrets which possess a higher degree of planar orientation and a larger crystallinity (>30%) or are γ-irradiated by a larger dose (>200 Mrad). The nature of the τ-peak is still the detrapping of trapped charge carriers, but the trap depth represented by the τ-peak is deeper and the ability of the trapping charge carriers is better as compared with that of the ρ-peak
Keywords :
electrets; electron traps; gamma-ray effects; hole traps; polymers; thermally stimulated currents; PET electrets; TSC; crystallinity; current peak; detrapping; gamma-irradiation; planar orientation; polyethylene terephthalate; tau -peak; thermally stimulated current spectra; trap depth; trapped charge carriers; Amorphous materials; Annealing; Crystallization; Electrets; Optical films; Polarization; Polymers; Positron emission tomography; Production facilities; Temperature;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167283
