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http://dx.doi.org/10.5714/CL.2015.16.3.219

Influence of oxidative atmosphere of the electron beam irradiation on cyclization of PAN-based fibers  

Shin, Hye Kyoung (Department of Chemistry, Inha University)
Park, Mira (Department of Organic Materials and Fiber Engineering, Chonbuk National University)
Kim, Hak-Yong (Department of Organic Materials and Fiber Engineering, Chonbuk National University)
Park, Soo-Jin (Department of Chemistry, Inha University)
Publication Information
Carbon letters / v.16, no.3, 2015 , pp. 219-221 More about this Journal
Abstract
In order to study the impact of atmosphere during electron beam irradiation (EBI) of polyacrylonitrile (PAN) precursor fibers, the latter were stabilized by EBI in both air and oxygen atmospheres. Gel-fraction determination indicated that EBI-stabilization under an oxygen atmosphere leads to an enhanced cyclization in the PAN fibers. In the Fourier-transform infrared spectroscopy analysis, the PAN fibers stabilized by EBI under an oxygen atmosphere exhibited a greater decrease in the peak intensity at 2244 cm−1 (C≡N vibration) and a greater increase in the peak intensity at 1628 cm−1 (C=N absorption) than the corresponding PAN fibers stabilized under an air atmosphere. From the X-ray diffraction analysis it was found that oxygen uptake in PAN fibers leads to an increase in the amorphous region, produced by cyclization.
Keywords
electron beam irradiation; stabilization; carbon fibers; polyacrylonitrile;
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Times Cited By KSCI : 3  (Citation Analysis)
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