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Preparation and characterization of spinnable pitch for general‐purpose carbon fiber from refined pitch
Author(s) -
Zhu Yaming,
Zhao ChunLei,
Hu ChaoShuai,
Yuan Ji,
Xu YunLiang,
Zhao XueFei
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47880
Subject(s) - materials science , thermogravimetric analysis , thermal stability , stacking , scanning electron microscope , composite material , fiber , fourier transform infrared spectroscopy , microstructure , analytical chemistry (journal) , diffraction , chemistry , optics , physics , organic chemistry
ABSTRACT Four types of spinnable pitches (MP‐N‐A, MP‐A, MP‐A‐H, and MP‐A‐N) for general‐purpose carbon fiber have been prepared under certain conditions with the refined pitch as the raw materials. Fourier transform infrared spectrum and solid‐state nuclear magnetic resonance spectra combined with curve‐fitting analysis have been used to characterize the average molecular structure ( I ar , CH 3 /CH 2 , S AR , and S HFG ) of spinnable pitches. Thermogravimetric analyses and polarizing microscope have been used to observe the thermal stability and the microstructure of spinnable pitches, respectively. The X‐ray diffraction combined with curve‐fitting analysis have showed that, the stacking heights ( L c ) of these four kinds of spinnable pitches were 2.21, 1.78, 1.79, and 1.76 nm, respectively. The parallel layers (N) of each spinnable pitch were 7.30, 6.02, 6.06, and 5.97. What is more, the numbers of aromatic ring in each layer ( n ) were 17.03, 11.61, 11.75, and 11.41. Finally, the scanning electron microscopy has been used to characterize the surface morphology of carbon fibers which obtained by each spinnable pitches. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47880.