Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (11): 1-9.doi: 10.13475/j.fzxb.20200200209

• Fiber Materials •     Next Articles

Temperature related creep rupture mechanism of high-tenacity polyester industrial fiber

CHEN Kang1, JIANG Quan2, JI Hong1, ZHANG Yang1, SONG Minggen2, ZHANG Yumei1(), WANG Huaping1   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
    2. Zhejiang Unifull Industrial Fiber Co., Ltd., Huzhou, Zhejiang 313017, China
  • Received:2020-02-01 Revised:2020-05-27 Online:2020-11-15 Published:2020-11-26
  • Contact: ZHANG Yumei E-mail:zhangym@dhu.edu.cn

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Abstract:

In order to investigate the creep rupture mechanism of high-tenacity polyester industrial fibers at different temperatures, in-situ small-angle X-ray scattering and wide-angle X-ray scattering characterizations were conducted on a high tenacity polyester fiber during creep rupture process at 80 ℃ and 200 ℃, respectively. The creep strain-time curves were categorised into tensile zone (I), creep deformation zone (II) and creep rupture zone (III). For the low-temperature creep rupture, a small part of lamellar surfaces was transformed into normal surface, and the tilting angle of the inclined lamellar surface increased with time in the first two zones. In creep rupture zone, the fully stretched amorphous molecular chains were broken, resulting in the disappearance of the periodic lamellar structure. For the high-temperature creep rupture process on the other hand, the surface of the lamellar structure always maintained an inclined state and the lamellar tilting angle gradually decreased in the first two zones. Highly-oriented molecular chains in the amorphous region exerted stress on the crystal region, which causes the surface chains in the amorphous region and the crystal region to be pulled out, resulting in the fracture of crystalline structure and the lamellar stack structure was damaged in creep rupture zone.

Key words: polyester industrial fiber, creep rupture mechanism, crystalline structure, lamellar structure, creep process

CLC Number: 

  • TS102

Fig.1

Creep strain-time curves and selected SAXS patterns of HT polyester fiber at 80 ℃ and 200 ℃"

Tab.1

Creep parameters of HT polyester fibers at different temperatures"

蠕变温度/
℃		 初始蠕变形
变率/%		 总蠕变形
变率/%		 蠕变过程中发生
的形变率/%
80 15.5 20.6 5.1
200 16.4 23.1 6.7

Fig.2

1-D SAXS profiles along q1 direction (a) and 1-D electron density correlation function at different strains (b) at 200 ℃"

Fig.3

Evolution of different lamellar structure parameters of HT polyester industrial yarn. (a) Lamellar structure evolutions with different creep time at 80 ℃; (b) Lamellar structure evolutions with different creep time at 200 ℃;(c) Microscopic long period strain and macroscopic fiber strain at different time; (d) Microscopic long period strain and corresponding macroscopic creep strain during zone II"

Fig.4

Evolutions of lamellar tilting angle with creep time of HT polyester at different temperatures (four-spot pattern part)"

Fig.5

2-D WAXS patterns of HT polyester during creep deformation process with different creep temperature"

Fig.6

1-D WAXS curves of HT polyester during creep deformation process at different creep temperature"

Fig.7

Evolutions of crystallite parameters of HT polyester with creep time at different temperature"

Fig.8

Evolutions of crystalline orientation,amorphous orientation and birefringence of HT polyester with creep time"

Fig.9

Physical molecular model of HT polyester during creep rupture process"

[1] HUANG L, PAN L, INOUE T. Effect of solid-state shearing of poly(ethylene terephtalate) on isothermal crystallization and fiber structure formation[J]. Journal of Applied Polymer Science, 2007,104(2):787-791.
doi: 10.1002/(ISSN)1097-4628
[2] RIM P B, NELSON C J. Properties of PET fibers with high modulus and low shrinkage (HMLS): I: yarn properties and morphology[J]. Journal of Applied Polymer Science, 1991,42(7):1807-1813.
doi: 10.1002/app.1991.070420702
[3] LIU Y, YIN L, ZHAO H, et al. Insights into process-structure-property relationships of poly (ethylene terephthalate) industrial yarns by synchrotron radiation WAXD and SAXS[J]. Journal of Applied Polymer Science, 2015,132(36):42512-42522.
[4] MURTHY N S, GRUBB D T. Deformation in lamellar and crystalline structures: in situ simultaneous small-angle X-ray scattering and wide-angle X-ray diffraction measurements on polyethylene terephthalate fibers[J]. Journal of Polymer Science Part B: Polymer Physics, 2003,41(13):1538-1553.
doi: 10.1002/(ISSN)1099-0488
[5] 葛陈程, 吕汪洋, 石教学, 等. 应用二维X射线衍射法测定涤纶工业丝结晶和取向行为[J]. 纺织学报, 2018,39(3):19-25.
GE Chencheng, LÜ Wangyang, SHI Jiaoxue, et al. Measurement of crystallinity and crystal orientation of polyester industrial yarns by 2-D X-ray diffraction[J]. Journal of Textile Research, 2018,39(3):19-25.
[6] 薛元, 汤成坦, 彦志勇. 工业用涤纶长丝的结构与性能[J]. 纺织学报, 2009,30(11):33-36.
XUE Yuan, TANG Chengtan, YAN Zhiyong. Structure and properties of industrial PET filaments[J]. Journal of Textile Research, 2009,30(11):33-36.
[7] LECHAT C, BUNSELL A R, DAVIES P. Tensile and creep behaviour of polyethylene terephthalate and polyethylene naphthalate fibres[J]. Journal of Materials Science, 2011,46(2):528-533.
doi: 10.1007/s10853-010-4999-x
[8] CHEN K, YU J, LIU Y, et al. Creep deformation and its correspondence to the microstructure of different polyester industrial yarns at room temperature[J]. Polymer International, 2019,68(3):555-563.
doi: 10.1002/pi.2019.68.issue-3
[9] SHIOYA M, KAWAZOE T, OKAZAKI R, et al. Small-angle X-ray scattering study on the tensile fracture process of poly (ethylene terephthalate) fiber[J]. Macromolecules, 2008,41(13):4758-4765.
doi: 10.1021/ma7027616
[10] LIU Y, YIN L, ZHAO H, et al. Strain-induced structural evolution during drawing of poly (ethylene terephthalate) fiber at different temperatures by in situ synchrotron SAXS and WAXD[J]. Polymer, 2017,119:185-194.
doi: 10.1016/j.polymer.2017.05.032
[11] YU J, WANG R, YANG C, et al. Morphology and structure changes of aromatic copolysulfonamide fibers heat-drawn at various temperatures[J]. Polymer International, 2014,63(12):2084-2090.
doi: 10.1002/pi.4747
[12] YU J, CHEN K, LI X, et al. Performance and structure changes of the aromatic co-polysulfonamide fibers during thermal-oxidative aging process[J]. Journal of Applied Polymer Science, 2016,133(41):44078-44088.
[13] YU J, TIAN F, CHEN S, et al. Structure and property development of aromatic copolysulfonamide fibers during wet spinning process[J]. Journal of Applied Polymer Science, 2015,132(31):42343-42350.
[14] ALEXANDER L E. X-ray diffraction methods in polymer science[M]. New York: Wiley-Interscience, 1969: 582.
[15] HUISMAN R, HEUVEL H M. The effect of spinning speed and drawing temperature on structure and properties of poly(ethylene terephthalate) yarns[J]. Journal of Applied Polymer Science, 1989,37(3):595-616.
doi: 10.1002/app.1989.070370302
[16] TANG Y, JIANG Z, MEN Y, et al. Uniaxial deformation of overstretched polyethylene: in-situ synchrotron small angle X-ray scattering study[J]. Polymer, 2007,48(17):5125-5132.
doi: 10.1016/j.polymer.2007.06.056
[17] HSIAO B S, VERMA R K. A novel approach to extract morphological variables in crystalline polymers from time-resolved synchrotron SAXS data[J]. Journal of Synchrotron Radiation, 1998,5(1):23-29.
doi: 10.1107/S0909049597010091
[18] WANG Z G, HSIAO B S, FU B X, et al. Correct determination of crystal lamellar thickness in semicrystalline poly (ethylene terephthalate) by small-angle X-ray scattering[J]. Polymer, 2000,41(5):1791-1797.
doi: 10.1016/S0032-3861(99)00327-4
[19] YAN T, YAO Y, JIN H, et al. Elastic response of copolyether-ester fiber on its phase morphology under different heat-treatment condition[J]. Journal of Polymer Research, 2016,23(11):226-233.
doi: 10.1007/s10965-016-1118-y
[20] 邹家熊, 于金超, 张烨, 等. 高强低伸型聚酯工业丝受热条件下的应用特性变化[J]. 合成纤维, 2019,48(2):11-15.
ZOU Jiaxiong, YU Jinchao, ZHANG Ye, et al. Application characteristics of high strength and low stretch polyester industrial yarn under heating condi-tions[J]. Synthetic Fiber in China, 2019,48(2):11-15.
[21] MA Q, GEORIGIEV G, CEBE P. Constraints in semicrystalline polymers: using quasi-isothermal analysis to investigate the mechanisms of formation and loss of the rigid amorphous fraction[J]. Polymer, 2011,52(20):4562-4570.
doi: 10.1016/j.polymer.2011.08.006
[22] MENCZEL J D. The rigid amorphous fraction in semicrystalline macromolecules[J]. Journal of Thermal Analysis and Calorimetry, 2011,106(1):7-24.
doi: 10.1007/s10973-011-1496-7
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