STUDIES ON THE RELATIONSHIPS BETWEEN THE STRUCTURE AND THE LOCALIZED ENERGY STATES OF POLY (ETHYLENE TEREPHTHALATE) ELECTRETS
ZHANG XING-YUAN (张兴元)a, ZHOU YI-QIN (周漪琴)b
a Department of Materials Science and Engineering, University of Science of Technology of China, Hefei 230026, China; b Department of Chemisty, Qingdao University, Qingdao 266071, China
Abstract A series of poly(ethytene terephthalate) (PET) films with different degrees of planar orientation [$\Delta$(xy)z], crystallinity (Xc) and molecular weights were prepared by drawing biaxially, annealing at 110℃ and $\gamma$-imadiation of 0.5-4MGy. The peaks of localized energy states were separated from the detrapping cur-rent curves by means of poling temperature scanning method of themally stimulated current. The depth of localized energy levels enlarged with the rise of $\Delta$(xy)z, Xc and $\gamma$-inadiation dose. The kinds of structural defects increased because of the changes of orientation structure of chains, crystalline structure and molecular chain structure, which caused the number of localized states to increase from 2 to 6 and the distribution width of the depth of localized levels to broaden.
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
ZHANG XING-YUAN (张兴元), ZHOU YI-QIN(周漪琴) STUDIES ON THE RELATIONSHIPS BETWEEN THE STRUCTURE AND THE LOCALIZED ENERGY STATES OF POLY (ETHYLENE TEREPHTHALATE) ELECTRETS 1993 Acta Physica Sinica (Overseas Edition) 2 270
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