含有脂肪酸氮氧自由基8 NS的硬弹性聚丙烯纤维,其ESR谱在较宽的温度范围里同时包含有宽谱线和窄谱线两个部分。在拉伸和松弛过程中,宽谱线和窄谱线的相对强度和旋转相关时间也随着发生变化。宽谱线反映了链段运动、取向的信息,窄谱线反映了微孔生成与消失的信息。 Hard elastic polypropylene fibers containing a fatty acid nitroxide 8 NS have ESR spectra that contain both broad and narrow bands in a wide temperature range. During stretching and relaxation, the relative intensities and rotation-related times of broad and narrow lines also change. Wide lines reflect the movement of segments, orientation information, and narrow lines reflect the generation and disappearance of micropores.