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- W2323396189 startingPage "121" @default.
- W2323396189 abstract "Coal-tar pitch was heat-treated at various temperatures up to 1000°C and the weight loss (Δw/w) measurement, CHN analysis, polarized-light microscopic observation, IR and ESR spectra, and X-ray diffraction study were done. These data gave us the feature of structural change of coal-tar pitch through carbonization reaction, especially the change which occurred in the temperature range of pitch solidifying was remarkable. The behavior of structural change varied with the heat-treatment temperature (HTT) 500-600°C as a border. At HTT 600°C the bulk mesophase was formed completely and absorption bands except aromatic rings disappeared in IR spectrum, and the value of interlayer spacing showed for a typical disoriented carbon, that was 3.44Å. The radical concentration (N) was the maximum at this HTT 600°C.By plotting log N against Δw/w, a linear relationship was observed. This relationship suggests that the amount of released components is in proportion to the amount of breaking hydrocarbon chains, and it brings the radical formation." @default.
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- W2323396189 date "1990-01-01" @default.
- W2323396189 modified "2023-10-16" @default.
- W2323396189 title "Characterization of Structural Change during Carbonization of Coal-tar Pitch" @default.
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- W2323396189 doi "https://doi.org/10.7209/tanso.1990.121" @default.
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