Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (12): 1-6.doi: 10.13475/j.fzxb.20200501006

• Fiber Materials •     Next Articles

Preparation and properties of poly(phthalazinone ether ketone) fibers by dry spinning

DONG Dalin1, BIN Yuezhen1(), JIAN Xigao1,2   

  1. 1. School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
    2. Liaoning Province Engineering Technology Center of High Performance Resins, Dalian, Liaoning 116024, China
  • Received:2020-05-06 Revised:2020-09-04 Online:2020-12-15 Published:2020-12-23
  • Contact: BIN Yuezhen E-mail:binyz@dlut.edu.cn

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Abstract:

To expand applications of poly(phthalazinone ether ketone) (PPEK) in fiber preparation, PPEK fibers were prepared by dry spinning with PPEK and mixed solvent of p-chlorophenol and 1,1',2,2'-tetrachloroethane (volume ratio is 1:1). PPEK solution and PPEK fibers were characterized by rotating rheometer, differential scanning calorimeter, polarizing microscope, universal tensile tester, X-ray diffractometer and fiber sound velocimeter. The results show that optimal spinning temperature of 40% PPEK solution is 140 ℃. After being elongated by 1.43 times, breaking strength, elastic modulus and sonic orientation factor of PPEK fibers reach 167.6 MPa, 4.6 GPa and 0.570 5, respectively. Hot elongated PPEK fibers has good heat resistance and remains amorphous with glass transition temperature of higher than 250 ℃.

Key words: poly(aryl ether ketone), diazanaphthalene, mixed solvent, dry spinning, high temperature resistance performance

CLC Number: 

  • TQ342

Fig.1

Illustration of customized spinning machine"

Tab.1

Preparation parameters and linear density of PPEK fibers"

样品
编号		 喷丝
孔直
径/mm		 喷丝
孔长
径比		 柱塞
直径/
mm		 加热料
桶温度/
℃		 柱塞下
降速度/
(mm·s-1)		 纺丝液
喷出速度/
(cm·s-1)		 热甬道7
温度/
℃		 热甬道9
温度/
℃		 收丝辊
线速度/
(cm·s-1)		 牵伸
比		 线密
度/tex
1# 0.5 2.0 14.89 140 0.044 9 3.98 — — — — 516.4
2# 0.5 2.0 14.89 140 0.065 1 5.77 160 280 14.56 2.52 45.0

Fig.2

PPEK precursors"

Fig.3

Viscosity-temperature curve of PPEK solution"

Fig.4

Surface image of 2# fiber (×400)"

Fig.5

DSC spectra of PPEK fibers with different stretching ratio"

Fig.6

Stress-strain curves of PPEK fibers with different stretching ratio"

Tab.2

Mechanical properties of PPEK fibers with different stretching ratio"

拉伸倍数 屈服强度/MPa 屈服应变/% 断裂强度/MPa 断裂应变/% 弹性模量/GPa
未拉伸 53.6±0.2 6.0±0.3 49.5±0.2 170.7±4.4 2.0±0.1
0.50 102.8±0.1 6.9±0.4 97.6±0.3 93.1±1.2 2.8±0.3
1.00 151.3±0.2 9.2±0.5 4.3±0.1
1.43 167.6±0.1 8.8±0.3 4.6±0.1

Fig.7

XRD spectra of PPEK and PPEK fibers"

Tab.3

Sonic orientation factor of PPEK fibers with different stretching ratio"

拉伸倍数 C/(m·s-1) fs
未拉伸 2 490 ± 30 0.268 3
0.50 2 720 ± 20 0.386 8
1.00 3 050 ± 10 0.512 3
1.43 3 250 ± 10 0.570 5
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