1998 Fiscal Year Final Research Report Summary
Microstructural Control of Laminated Compounds by the Modification of Pitches at Low Temperatures
| Project/Area Number |
08405056
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
無機工業化学
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
YASUDA Eiichi Tokyo Institute of Technology, Materials and Structures Lab.Professor, 応用セラミックス研究所, 教授 (70016830)
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| Co-Investigator(Kenkyū-buntansha) |
OKUI Norimasa Tokyo Institute of Technology, Faculty of Engineering Professor, 工学部, 教授 (20111651)
MATSUO Youtaro Tokyo Institute of Technology, Faculty of Engineering Professor, 工学部, 教授 (70016608)
AKATSU Takashi Tokyo Institute of Technology, Materials and Structures Lab.Associate, 応用セラミックス研究所, 助手 (40231807)
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| Project Period (FY) |
1996 – 1998
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| Keywords | Pitch / Carbonization / Charge-transfer Complexes / Iodine / Carbon Yield |
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| Research Abstract |
Precise evaluation on iodine-treated pitch has been carried out using FT-IR, pulsed-EPR, elemental analysis, ^<127>I-MR and viscometer for considering the reforming mechanism of pitch by iodine. Viscosity of pit h increased by 100。C iodine-treatment and de-hydration reaction took place during the iodine treatment. ^<127>I-NMR analysis reveled that almost iodine existed in pitch in a form of molecule or ion. Iodine made charge-transfer complexes with condensed aromatic molecules having ca.14 number of six-member-rings ; which was analyzed using pulsed-EPR etc.
Carbon yield increased and the size in microstructure of produced carbon decreased by iodine treatment. C/C composites could be produced without densification process, i.e. in autoclave, using pitches having low softening point. The composites maintained its shear strength after higher heat-treatment. Gas analysis during carbonization revealed that iodine played an important role on polymerization during the process.
Above the all results conclude as follows ; (1) iodine makes charge-transfer complex with molecules in pitch at low temperature and proceed de-hydration of the pitch. (2) Viscosity of the pitch increases, which results in good formability. (3) The microstructure of the produced carbon decreases.
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