中国物理B ›› 1993, Vol. 2 ›› Issue (4): 270-279.doi: 10.1088/1004-423X/2/4/005
周漪琴1, 张兴元2
ZHANG XING-YUAN (张兴元)a, ZHOU YI-QIN (周漪琴)b
摘要: A series of poly(ethytene terephthalate) (PET) films with different degrees of planar orientation [Δ(xy)z], crystallinity (Xc) and molecular weights were prepared by drawing biaxially, annealing at 110℃ and γ-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 Δ(xy)z, Xc and γ-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.
中图分类号: (Polymers, elastomers, and plastics)