研究用X-射线衍射法分析纤维结构中介态的变化。直接以X-射线衍射法测量并计算高速纺PET纤维非晶区的取向因子及中介态的相对含量,提出利用晶区和非晶区取向因子的区别来分离非晶态衍射曲线的方法,建立了X-射线衍射法计算非晶区取向因子的公式及中介态百分含量的方法。 Study of X-ray diffraction analysis of fiber structure changes in the state. Directly using X-ray diffraction method to measure and calculate the orientation factor and the relative content of the intermediate state in high-speed spun PET fiber, and propose the method to separate the amorphous diffraction curve by using the difference of the orientation factor between the crystalline region and the amorphous region. X-ray diffraction method to calculate the amorphous orientation factor formula and the percentage content of the method.