Evaluation of naphthalene-derived mesophase pitches as a binder for carbon-carbon composites

Ryuji Fujiura, Takashi Kojima, Koichi Kanno, Isao Mochida, Yozo Korai

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Binding properties of the mesophase pitches produced catalytically from naphthalene with HF/BF3 were examined in terms of their carbon value, fluidity, thermal stability and oxidative stabilization reactivity. The present pitches with 100% anisotrophy and low softening points of 207-275°C provided very high coke yields of 80-88 wt% under atmospheric pressure and 90-95 wt% under 30 atm. Pitches with softening points of 207 and 224°C exhibited strikingly low viscosity below 1 Pa{black diamond suit}s at 350°C. It is noted that viscosity-temperature profiles of a series of the present pitches cover the complete area of the processing window for the manufacture of carbon-carbon composites, whose processes typically include impregnation of mesophase pitch into a two-dimensional carbon fiber preform, oxidative stabilization and successive carbonizations. The pitches were thermally stable under nitrogen at 300°C, keeping the melt viscosity constant for longer than 100 h to assure easy handling. At the same time, they were very reactive for the oxidation in air at 200°C for rapid stabilization.

Original languageEnglish
Pages (from-to)97-102
Number of pages6
JournalCarbon
Volume31
Issue number1
DOIs
Publication statusPublished - Jan 1 1993

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Carbon carbon composites
Naphthalene
Binders
Stabilization
Viscosity
Fluidity
Carbonization
Impregnation
Coke
Atmospheric pressure
Carbon fibers
Diamonds
Thermodynamic stability
Nitrogen
Carbon
Oxidation
Processing
Air
naphthalene
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Evaluation of naphthalene-derived mesophase pitches as a binder for carbon-carbon composites. / Fujiura, Ryuji; Kojima, Takashi; Kanno, Koichi; Mochida, Isao; Korai, Yozo.

In: Carbon, Vol. 31, No. 1, 01.01.1993, p. 97-102.

Research output: Contribution to journalArticle

Fujiura, R, Kojima, T, Kanno, K, Mochida, I & Korai, Y 1993, 'Evaluation of naphthalene-derived mesophase pitches as a binder for carbon-carbon composites', Carbon, vol. 31, no. 1, pp. 97-102. https://doi.org/10.1016/0008-6223(93)90161-3
Fujiura, Ryuji ; Kojima, Takashi ; Kanno, Koichi ; Mochida, Isao ; Korai, Yozo. / Evaluation of naphthalene-derived mesophase pitches as a binder for carbon-carbon composites. In: Carbon. 1993 ; Vol. 31, No. 1. pp. 97-102.
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N2 - Binding properties of the mesophase pitches produced catalytically from naphthalene with HF/BF3 were examined in terms of their carbon value, fluidity, thermal stability and oxidative stabilization reactivity. The present pitches with 100% anisotrophy and low softening points of 207-275°C provided very high coke yields of 80-88 wt% under atmospheric pressure and 90-95 wt% under 30 atm. Pitches with softening points of 207 and 224°C exhibited strikingly low viscosity below 1 Pa{black diamond suit}s at 350°C. It is noted that viscosity-temperature profiles of a series of the present pitches cover the complete area of the processing window for the manufacture of carbon-carbon composites, whose processes typically include impregnation of mesophase pitch into a two-dimensional carbon fiber preform, oxidative stabilization and successive carbonizations. The pitches were thermally stable under nitrogen at 300°C, keeping the melt viscosity constant for longer than 100 h to assure easy handling. At the same time, they were very reactive for the oxidation in air at 200°C for rapid stabilization.

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