
Influence of oxidative atmosphere of the electron beam irradiation on cyclization of PAN-based fibers
Influence of oxidative atmosphere of the electron beam irradiation on cyclization of PAN-based fibers
- Hye Kyoung Shin Mira Park Hak-Yong Kim Soo-Jin Park
- 한국탄소학회
- Carbon Letters
- 제16권 제3호
- 등재여부 : KCI등재
- 2015.07
- 219 - 221 (3 pages)
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.
1. Introduction
2. Experimental
3. Results and Discussion
References