@article{oai:soar-ir.repo.nii.ac.jp:00013392,
 author = {Kang,  Young-Ah and Kim,  Kyoung-Hou and Ikehata,  Soichiro and Ohkoshi,  Yutaka and Gotoh,  Yasuo and Nagura,  Masanobu and Urakawa,  Hiroshi},
 issue = {9},
 journal = {POLYMER},
 month = {Apr},
 note = {Structural development of isotactic polypropylene (iPP) fibers was analyzed in real time through in-situ WAXD/SAXS and fiber temperature measurements during CO(2) laser-heated drawing because the CO(2) laser irradiation can nearly fix the necking position on the running fiber. The in-situ WAXD/SAXS measurements were carried out with a high time-resolution of 0.4 ms. The as-spun iPP fibers of two different initial structures were laser-heat-drawn to a draw ratio of 6.5. For the drawing of PP fiber containing mesophase structure, diffraction from the oriented mesophase remained until an elapsed time of 1.0 ms, when oriented alpha-phase crystal started to form. Meanwhile, for the drawing of PP fiber containing both an alpha-phase and a mesophase structure, fragmented microcrystals were reorganized by orientation-induced crystallization before an elapsed time of 1.0 ms. The long period increased drastically with fragmentation, and decreased with reorganization. The long period was about 16 nm for both drawn fibers., Article, POLYMER. 52(9):2044-2050 (2011)},
 pages = {2044--2050},
 title = {In-situ analysis of fiber structure development for isotactic polypropylene},
 volume = {52},
 year = {2011}
}