Control of molecular orientations in mesophase pitch-based carbon fibre by blending PVC pitch

Isao Mochida, Hiroshi Toshima, Yozo Korai, Tadayuki Matsumoto

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)

抄録

Coal tar-derived mesophase pitch and its blends with PVC pitch in 5 or 10 wt% were spun at temperatures from 340 to 390° C by applying pressurized nitrogen. The parent mesophase pitch and the blended pitch showed an excellent spinnability at temperatures from 360 to 380° C and from 350 to 380° C, respectively, to give a thin pitch fibre of 10 μm diameter. The transverse texture of the fibres from the parent mesophase pitch showed the radial orientation regardless of a higher spinning temperature of 390° C. In contrast, those from the blended pitches showed random orientation even at the lower spinning temperature of 350° C. The amounts of the blend extruded by spinning at each temperature under 0.2 kg cm-2 G-1 were always larger than those of the mesophase pitch. It is clarified in the present study that blending PVC pitch can realize stable spinning at lower temperatures, where the molecular orientation in the transverse section of the resultant carbon fibre was controlled through decreasing the viscosity of the whole mesophase pitch.

本文言語英語
ページ(範囲)57-62
ページ数6
ジャーナルJournal of Materials Science
24
1
DOI
出版ステータス出版済み - 1 1989

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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