Journal
NEW CARBON MATERIALS
Volume 24, Issue 1, Pages 83-88Publisher
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DOI: 10.1016/S1872-5805(08)60039-6
Keywords
Precursor pitch; Carbon fiber; Photomicroscopy; X-ray diffractometry
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Funding
- Highet Education Commission of Pakistan for the Promotion of Science [20-377/R D/05/1057]
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A petroleum pitch was heated at 420 degrees C for 7h in nitrogen to prepare a carbon fiber precursor with a softening point of 295 degrees C. The precursor was Successfully melt-spun into fibers through a Circular nozzle of a monofilament spinning apparatus, and these were then stabilized at 320 degrees C in air and finally carbonized at 1000 degrees C in nitrogen to produce carbon fibers. SEM, TGA, FT-IR, and XRD were performed to characterize the petroleum pitch, the precursor, the asspun fibers, the stabilized fibers, and the carbon fibers. It is found that the precursor contains 70.5% mass fraction of mesophase that is aligned upon spinning, and aliphatic side chains that are beneficial to spinning. The carbon fibers have a radial core structure with a linear and bent type anisotropic texture. The maximum tensile strength of the carbon fiber is 650 MPa.
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