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Carbonization behavior of coal tar pitch modified with benzoquinone |
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| Authors: | K S Yang D J Lee K H An J H Choi H Kumagai and Y Sanada |
| Affiliation: | (1) Department of Textile Engineering, Chonnam National University, Yongbong-dong 300, Buk-ku, Kwangju, 500-757, South Korea;(2) Department of Textile Engineering, Chonnam National University, Yongbong-dong 300, Buk-ku, Kwangju, 500-757, South Korea;(3) Korea Institute of Energy Research, Yusong-Ku, Daejion, 305-600, South Korea;(4) Research Institute of Industrial Science & Technology, P. O. Box 135, Pohang, 790-600, South Korea;(5) Center for Advanced Research of Energy Technology, Hokkaido University, N-13 W8, Kita-ku, Sapporo, 060, Japan |
| Abstract: | A soluble fraction of coal tar pitch (CP) in tetrahydrofuran (THF) was reacted with p-benzoquinone (BQ) at 160 and 180°C and followed by carbonization and graphitization. The reaction and carbonization behavior were monitored in-situ by using differential scanning calorimeter, high-temperature 1H NMR and high-temperature ESR. The reactions of CP and BQ resulted in an increase in molecular weight with an increase in BQ concentration. Such molecular weight increases led to the formation of a less ordered structure due to the reduced mobility of the molecules. The relative order of the carbonized materials was determined by using polarized light microscope and X-ray diffraction. The molecular size of the precursor was recognized as an important factor in determining the morphology of carbon materials. |
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