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1.本文采用D.J.Johnson提出的数学表达式计算各衍射角的衍射强度即:y_i(计算)=sum from j=1 to N Q_(ij)+gR(x_i)。在计算中为了提高精度,克服病态矩阵我们采用阻尼最小二乘法求解,并采用随机投点选初值。 2.本文没有采用多项式函数表征无定形散射,而是直接用测量值代入进行计算。 3.本文分别做了IPP纤维及不同拉伸倍数IPP薄膜、PET纤维及不同热处理PET薄膜的分峰,求出了各自的结晶度并与密度法进行了比较。
1. In this paper, the diffraction intensity of each diffraction angle is calculated by the mathematical expression proposed by D.J. Johnson. That is: y_i (calculation) = sum from j = 1 to N Q_ (ij) + gR (x_i). In order to improve the accuracy of the calculation, to overcome the diseased matrix we use the least squares method of damping, and the use of randomly selected initial value. 2. This paper does not use polynomial function to characterize the amorphous scattering, but directly with the measured value into the calculation. In this paper, IPP fiber and different stretching IPP film, PET fiber and different heat treatment of PET film were peaked, obtained their crystallinity and were compared with the density method.