Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (12): 9-15.doi: 10.13475/j.fzxb.20190202608

• Fiber Materials • Previous Articles     Next Articles

Chemical stability and corrosion degradation of polyarylester fiber

JIANG Zhaohui1,2,3, JIN Mengtian4, GUO Zengge1(), JIA Zhao1, WANG Qicai1, JIN Jian4,5   

  1. 1. Lutai School of Textile and Apparel, Shandong University of Technology, Zibo, Shandong 255000, China
    2. Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang312000, China
    3. Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou, Fujian 350108, China
    4. State Key Laboratory of Biobased Fiber Manufacture Technology, China Textile Academy, Beijing 100025, China
    5. Collaborative Innovation Center for Eco-Textiles of Shandong Province, Qingdao University, Qingdao, Shandong 266071, China
  • Received:2019-02-18 Revised:2019-09-20 Online:2019-12-15 Published:2019-12-18
  • Contact: GUO Zengge E-mail:guozengge@sdut.edu.cn

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Abstract:

In order to investigate the resistance of polyacrylester fiber to high damp heat and strong corrosion, the fibers were treated by strong acid, alkali and oxidant, and then the morphological structure, aggregation structure and macromolecular chain structure of the fibers were studied. The results show that the surfaces of fibers treated with H2SO4 show no significantly change at room temperature and 60 ℃, while only a few grooves appear in the surface of fibers treated with HNO3. However, after treatment by KMnO4, the transverse grooves of the fibers increase and the longitudinal microcracks appear. Especially after treatment by NaOH, the surface of the fibers changes from grooves to pits and even show a corrosion fracture state. Acid and KMnO4 don't significantly destroy the ordered structure of the crystalline region, while NaOH solution reduces the regularity of the crystalline region. The breakage of —CH bond on the benzene ring of macromolecular chains occurs after treatment by H2SO4, HNO3, NaOH and KMnO4, and eventually leads to degradation of polyarylester fibers and reduction of residual ratio.

Key words: polyarylester fiber, chemical stability, aggregation structure, high performance fiber

CLC Number: 

  • TQ317.2

Fig.1

OM images of polyarylester fibers (×100). (a) Longitudinal direction; (b) Cross-section"

Tab.1

Mechanical properties of polyarylester and PPTA fibers"

纤维名称 断裂强
力/cN		 断裂强度/
(cN·dtex-1)		 断裂伸
长率/%		 初始模量/
(cN·tex-1)		 断裂功/
mJ
聚芳酯纤维 234.46 15.83 6.61 336.43 0.77
PPTA纤维 48.14 15.32 5.30 314.35 0.13

Fig.2

OM images of polyarylester fibers after treated by acid solutions at room temperature (×100). (a) Untreated; (b) H2SO4(6 h); (c) H2SO4(24 h); (d) HNO3(6 h); (e) HNO3(24 h)"

Fig.3

OM images of polyarylester fibers after treatment by acid solution at 60 ℃ (×100). (a) Untreated; (b) H2SO4(12 h); (c) HNO3(12 h)"

Fig.4

SEM images of polyarylester fibers after treatment by acid solution at 60 ℃(×5 000). (a) Untreated; (b) H2SO4 (12 h); (c) HNO3(12 h)"

Fig.5

OM images of polyarylester fibers after treatment by KMnO4 solution(×100). (a) Untreated; (b) Room temperature(12 h); (c) Room temperature(18 h); (d) 60 ℃(4 h); (e) 60 ℃(6 h); (f) 60 ℃(12 h)"

Fig.6

OM images of polyarylester fibers after treatment by NaOH solution(×100). (a) Untreated (b) Room temperature(6 h); (c) Room temperature(12 h); (d) Room temperature(18 h); (e) Room temperature(24 h); (f) 60 ℃(4 h); (g) 60 ℃(6 h); (h) 60 ℃(10 h); (i) 60 ℃(12 h)"

Fig.7

SEM images of polyarylester fibers after treatment by NaOH and KMnO4 solution(×5 000). (a) Untreated; (b) KMnO4 solution; (c) NaOH solution"

Fig.8

Diameter curves of polyarylester fibers after chemical treatment. (a) Room temperature; (b) 60 ℃"

Fig.9

DSC curves of polyarylester fibers after chemical treatment"

Fig.10

FT-IR curves of polyarylester fibers after chemical treatment"

Fig.11

TG (a) and DTG (b) curves of polyarylester fibers"

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