The effect of the spinning conditions on the structure of mesophase pitch-based carbon fibers by Taguchi method

다국어 초록 (Multilingual Abstract)

Taguchi’s experimental design was employed in the melt spinning of molten mesophase pitch to produce carbon fibers. The textures of the obtained carbon fibers were radial with varied crack angles, as observed by scanning electron microscopy and polarized optical imaging. The diameter, crack angle, preferred orientation, and tensile modulus of the produced samples were examined to investigate the influence of four spinning variables. The relative importance of the variables has been emphasized for each characteristic. The results show that thicker carbon fiber can be obtained with a smaller entry angle, a higher spinning temperature, a reduced winding speed, and an increased extrusion pressure. The winding speed was found to be the most significant factor in relation to the fiber diameter. While it was observed that thicker carbon fiber generally shows improved preferred orientation, the most important variable affecting the preferred orientation was found to be the entry angle. As the entry angle decreased from 120° to 60°, the shear flow was enhanced to induce more ordered radial alignment of crystallite planes so as to obtain carbon fibers with a higher degree of preferred orientation. As a consequence, the crack angle was increased, and the tensile modulus was improved.

참고문헌 (Reference)

1 Difendorf RJ, Rensselaer Polytechnic Institute 1983

2 T. Hamada, "Transverse structure of pitch fiber from coal tar mesophase pitch" Elsevier BV 26 (26): 837-841, 1988

3 J.J. Mchugh, "The orientation of mesophase pitch during fully developed channel flow" Elsevier BV 34 (34): 1315-1322, 1996

4 L.S. Singer, "The mesophase and high modulus carbon fibers from pitch" Elsevier BV 16 (16): 409-415, 1978

5 Seong-Ho Yoon, "The flow properties of mesophase pitches derived from methylnaphthalene and naphthalene in the temperature range of their spinning" Elsevier BV 32 (32): 273-280, 1994

6 A.A. Bright, "The electronic and structural characteristics of carbon fibers from mesophase pitch" Elsevier BV 17 (17): 59-69, 1979

7 R. D. Yang, "The application of factorial experimental design to the processing of polypropylene fibres" Springer Nature 36 (36): 3097-3101, 2001

8 Fleurot O, "The Viscoelatic Flow Behavior of Pitches" Clemson University 1998

9 Taguchi G, "Taguchi's Quality Engineering Handbook" John Wiley & Sons 223-, 2007

10 N.C Gallego, "Structure–property relationships for high thermal conductivity carbon fibers" Elsevier BV 32 (32): 1031-1038, 2001

11 T. Hamada, "Structures and physical properties of carbon fibers from coal tar mesophase pitch" Cambridge University Press (CUP) 2 (2): 850-857, 1987

12 Brydges WT, "Structure and modulus of carbon fibre" 2 : 255-, 1969

13 Seong-Ho Yoon, "Spinning characteristics of mesophase pitches derived from naphthalene and methylnaphthalene with HF/BF3" Elsevier BV 31 (31): 849-856, 1993

14 Ane Zaldua, "Slit die flow measurements of a liquid crystalline polyesteramide and its blends with polyarylate" Wiley-Blackwell 32 (32): 43-48, 1992

15 Tetsuya Tagawa, "Size effect on tensile strength of carbon fibers" Elsevier BV 238 (238): 336-342, 1997

16 F. P. La mantia, "Shear and nonisothermal elongational characterization of a liquid crystalline polymer" Wiley-Blackwell 29 (29): 625-631, 1989

17 Santanu Kundu, "Rheostructural studies of a discotic mesophase pitch at processing flow conditions" Springer Nature 49 (49): 845-854, 2010

18 Acierno D, "Rheology and Processing of Liquid Crystal Polymers" Chapman & Hall 1996

19 Douglas E. Turek, "Processing/property relationships of a thermotropic copolyester: 1. Effect of capillary die aspect ratio" Elsevier BV 34 (34): 2750-2762, 1993

20 Nazem FF, "Process for controlling the cross-sectional structure of mesophase pitch derived fibers"

21 T. Hamada, "Preferred orientation of pitch precursor fibers" Cambridge University Press (CUP) 5 (5): 1271-1280, 1990

22 Bahram Fathollahi, "Polarized‐light observations of flow‐induced microstructures in mesophase pitch" Society of Rheology 38 (38): 1591-1607, 1994

23 A.A. Ogale, "Orientation and dimensional changes in mesophase pitch-based carbon fibers" Elsevier BV 40 (40): 1309-1319, 2002

24 Jim-Shy Tsai, "Optimization of carbon fibre production using the Taguchi method" Springer Nature 30 (30): 2019-2022, 1995

25 I. Mochida, "Microstructure of mesophase pitch-based carbon fiber and its control" Elsevier BV 34 (34): 941-956, 1996

26 Ou-Yang T, "Method of precise determination of tensile modulus of single filaments"

27 Yanbo Yao, "Mesophase pitch-based carbon fiber spinning through a filter assembly and the microstructure evolution mechanism" Springer Nature 49 (49): 191-198, 2014

28 T. Matsumoto, "Mesophase pitch and its carbon fibers" Walter de Gruyter GmbH 57 (57): 1985

29 D.D. Edie, "Melt spinning pitch-based carbon fibers" Elsevier BV 27 (27): 647-655, 1989

30 Kengqing Jian, "Liquid crystal surface anchoring of mesophase pitch" Elsevier BV 41 (41): 2073-2083, 2003

31 Shilin Lu, "Large diameter carbon fibres from mesophase pitch" Elsevier BV 40 (40): 2109-2116, 2002

32 Yamada Y, "Laid-Open Japanese Patent 59-53717"

33 Taguchi G, "Introduction to Quality Engineering: Designing Quality into Products and Processes" Asian Productivity Organization 1986

34 Anthony D Cato, "Flow behavior of mesophase pitch" Elsevier BV 41 (41): 1411-1417, 2003

35 Edie DD, "Fibers and Composites" Taylor & Francis 24-, 2003

36 Nothwang WD, "Effects of shear rate and capillary entry angle on fiber properties" 1997

37 J.Z Liang, "Effects of operation conditions and die angles on the pressure losses in capillary flow of polystyrene melt" Elsevier BV 114 (114): 118-121, 2001

38 Mitsuaki Matsumoto, "Effect of spinning conditions on structures of pitch-based carbon fiber" Elsevier BV 31 (31): 715-720, 1993

39 SEONG-HO YOON, "Crack formation in mesophase pitch-based carbon fibres. Part II: detailed structure of pitch-based carbon fibres with some types of open cracks" Springer Nature 32 (32): 2759-2769, 1997

40 I. Mochida, "Control of transversal texture in circular mesophase pitch-based carbon fibre using non-circular spinning nozzles" Springer Nature 28 (28): 2331-2336, 1993

41 Evan Mitsoulis, "Bagley correction: the effect of contraction angle and its prediction" Springer Nature 42 (42): 309-320, 2003

42 Janice Breedon Jones, "Analysis of flaws in high-strength carbon fibres from mesophase pitch" Springer Nature 15 (15): 2455-2465, 1980

43 "ASTM C1557-03e1. Standard Test Method for Tensile Strength and Young's Modulus of Fibers"