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2022-12-14T03:49:10Z
1309:1310
In-situ analysis of fiber structure development for isotactic polypropylene
Kang, Young-Ah
Kim, Kyoung-Hou
Ikehata, Soichiro
Ohkoshi, Yutaka
Gotoh, Yasuo
Nagura, Masanobu
Urakawa, Hiroshi
Copyright© 2011 Elsevier Ltd.
Polypropylene
CO(2) laser drawing
Fiber structure development
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)
ELSEVIER SCI LTD
2011-04-19
eng
journal article
AM
http://hdl.handle.net/10091/16170
https://soar-ir.repo.nii.ac.jp/records/13392
https://doi.org/10.1016/j.polymer.2011.03.005
10.1016/j.polymer.2011.03.005
0032-3861
AA00776983
POLYMER
52
9
2044
2050
https://soar-ir.repo.nii.ac.jp/record/13392/files/In-situ_analysis_fiber_structure_development_isotactic.pdf
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