Mechanical behavior of crystal lattice strains detected by x-ray diffraction technique in a polymer spherulite to external excitation

A estimation of crystal lattice strain detected by dynamic x-ray diffraction technique is proposed by using a linear isothermal viscoelastic theory. In the actual calculation, the results with regard to the polar angle dependences of the apparent dynamic crystal lattice strain as well as the crystal lattice strain normalized by sample strain, are obtained and are tested by the experimental ones. In addition, from the theoretical calculation, the distribution of the in-phase component of crystal lattice strain is affected by the magnitude with regard to the real part of mechanical quantity such as viscoelastic Young’s modulus, while that of the out-of-phase component is affected by the magnitude with regard to the imaginary part of the mechanical quantity.