2024-03-29T02:31:45Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00021951
2022-12-14T04:19:58Z
1309:1310
Effects of dimensions and regularity on the mechanical properties of the smectic phase formed during orientation-induced crystallization of poly (ethylene terephthalate)
Tomisawa, Ren
Oneda, Shun
Ikaga, Toshifumi
Kim, KyoungHou
Ohkoshi, Yutaka
Okada, Kazuyuki
Masunaga, Hiroyasu
Kanaya, Toshiji
Katsuta, Hiroo
Funatsu, Yoshitsugu
Smectic phase
Poly(ethylene terephthalate)
Microfibril length
X-ray diffraction
Mechanical property
A fibrillar-shaped metastable smectic phase forms during orientation-induced crystallization of poly(ethylene terephthalate). We investigated the effects of dimensions and regularity of the smectic phase on the mechanical properties by high-precision X-ray measurements. The drawing stress dependence was 76-168 MPa and the spinning speed dependence of 250-2000 m/min. The proportion, persistence length, and thickness of the smectic phase achieved their maximum values at 0.3-0.4 ms after necking. At this time g(II) also reached a minimum value of 3.7%-4.3%. The persistence length increased linearly with the natural draw ratio of as-spun fibers at less than 1500 m/min. The maximum values of the proportion, persistence length, and thickness showed no dependence on the drawing stress; however, the proportion and persistence length increased more rapidly. The increase of d-spacing with drawing stress led to an apparent elastic modulus of approximately 40 GPa for the oriented molecular bundle.
Article
POLYMER.164:163-173(2019)
journal article
ELSEVIER SCI LTD
2019-02-15
application/pdf
POLYMER
164
163
173
0032-3861
AA00776983
https://soar-ir.repo.nii.ac.jp/record/21951/files/16K05910_02.pdf
eng
10.1016/j.polymer.2019.01.002
https://doi.org/10.1016/j.polymer.2019.01.002
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/