Fiber Structure Development of Nylon 6 After Necking

Kim, KyoungHou; Ohkoshi, Yutaka; Wakasugi, Akira; Komoriya, Aya; Ikaga, Toshifumi; Wataoka, Isao; Urakawa, Hiroshi; Masuda, Masato; Maeda, Yuhei

doi:10.2115/fiberst.fiberst.2017-0003

Cited by 2 publications

(2 citation statements)

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“…The SAXS data are able to provide quantitative lamellar structural parameters for better interpreting the structure evolution of the HT fiber during the creep process which is beneficial for understanding and predicting the its performance during long-term service. The quantitative lamellar structure parameters including long period, amorphous thickness, lamellar thickness and tilting angle of inclined lamellae from 2-D SAXS patterns were obtained based on the previous reports [19,[29][30][31]. The calculation details are provided in the supporting information (SAXS analysis).…”

Section: Resultsmentioning

confidence: 99%

“…Offline creep tests can not completely reflect the real-time changes of the structure during the creep process. In this work, the micro-structural evolutions of a high tenacity (HT) polyester fiber (1000 D/192 f) with creep loads from low to high levels (15 N, 50 N, 60 N) during the creep process were studied by means of in-situ simultaneous synchrotron small- and wide-angle X-ray scattering techniques (SAXS/WAXS) [19,20]. The creep and creep recovery (rupture) mechanism in terms of amorphous structure, lamellar structure and conformation structure in different length scales were identified.…”

Section: Introductionmentioning

confidence: 99%

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Structural evolutions during creep deformation of polyester industrial fiber via in situ synchrotron small-angle X-ray scattering/wide-angle X-ray scattering

Chen

Liu

et al. 2020

Journal of Industrial Textiles

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This paper aims to identify the creep mechanisms of high tenacity (HT) polyester industrial fiber under different loads. In-situ synchrotron small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) tests were conducted on a 1000 D HT fiber during the creep and creep recovery process with a low load (15 N) and a medium load (50 N) as well as creep rupture process with a high load (60 N). The measured creep strain-time curves comprised tensile zone (I), creep deformation zone (II) and creep recovery/rupture zone (III). The SAXS indicated that the macroscopic initial creep strain in zone I and creep deformations in zone II were attributed to conformation transition from gauche to trans in amorphous region, increasing the amorphous orientation and long period. Irreversible portion of conformation changes accounts for the small unrecoverable plastic creep strain after removing 15 N load in zone III. The initial creep strain in zone I and creep deformations in zone II of the 50 N creep process were bigger than the microscopic long period strain, because amorphous layers had conformational transformation and microfibril slippage which also produced a higher unrecoverable plastic creep strain in zone III. The long period increased significantly at the beginning of rupture zone with 60 N due to fragmentation of amorphous tie molecular. The disappearance of lamellar peaks at the end of rupture zone implied destruction of periodic lamellar structures, for the entire breakage of amorphous chains. The WAXS suggested that the crystal structure was stable under the creep loads.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%