| Abstract: | A comparison of the x-ray diffraction from twisted nylon 66 and poly(ethyleneterephthalate) monofilaments is made with the scatter predicated by a model assuming an affine deformation of the fiber. The x-ray diffraction of the model is characterized by an approximately constant intensity over the entire range of the azimuthal dispersion. With twisted nylon 66 fibers the (010) reflection is split into a bimodal intensity distribution about the equator, while the (100) reflection maintains a distinct maximum on the equator. It is proposed that this difference is due primarily to the fact that a plastic deformation involving rotation of crystal planes occurs more readily when the shear stress acts in 010] direction than in the case when it acts in the 100] direction. A similar behavior is found with poly(ethylene terephthalate) fiber. |
