The change of ultra-small-angle X-ray scattering (USAXS) image after necking was taken for poly(ethylene terephthalate) (PET) and poly(phenylene sulfide) (PPS) fibers. USAXS pattern of PPS shows three streaks, which were meridional and equatorial streaks and total reflection. In addition to the three streaks observed for PPS, USAXS pattern of PET shows a layer-lined streak. Far stronger meridional streak of PPS means the periodic density deviation preliminary formed in the as-spun fiber, and the layer-lined USAXS streak of PET could be explained by the periodic bundle of a fibrillar-shaped smectic phase.
- Ren Tomisawa
- Takumi Ando
- Yoshitsugu Funatsu
