EPR spectroscopic and X-Ray diffraction studies of carbon fibers with different mechanical properties

• Published in: Russian journal of physical chemistry. B 2017-03, Vol.11 (2), p.233-241
• Main Authors: Kovarskii, A. L., Kasparov, V. V., Krivandin, A. V., Shatalova, O. V., Korokhin, R. A., Kuperman, A. M.
• Format: Article
• Language: English
• Subjects: Alloys; Carbon fiber reinforced plastics; Carbon fibers; Chemistry; Chemistry and Materials Science; Elastic analysis; Elastic properties; Elastic scattering; Electron paramagnetic resonance; Mechanical properties; Physical Chemistry; Polyacrylonitrile; Resonance scattering; Scattering angle; Structure of Chemical Compounds. Spectroscopy; X-ray diffraction; X-ray scattering
• ISSN: 1990-7931; 1990-7923
• DOI: 10.1134/S1990793117020208

The carbon fibers obtained by carbonization of polyacrylonitrile fibers were studied by electron paramagnetic resonance and X-ray diffraction analysis in the range of small and wide scattering angles. Their elastic and strength characteristics were also studied. The concentration of the paramagnetic centers was correlated with the mechanical properties of carbon fibers. The wide-angle X-ray diffraction study did not reveal essential structural differences in the carbon fiber samples with different mechanical properties. At the same time, the small-angle X-ray scattering study showed that the fiber nanostructures with different mechanical properties differ substantially.