Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effects of fiber forms on thermal anisotropy in fibrous composites

섬유강화 복합재의 열이방성에 대한 섬유 형태적 영향

  • Sim, Hwan-Bo (Dept.of Chemical Engineering, College of Engineering, Chungnam National University) ;
  • Lee, Bo-Seong (Dept.of Chemical Engineering, College of Engineering, Chungnam National University)
  • 심환보 (충남대학교 공과대학 화학공학과) ;
  • 이보성 (충남대학교 공과대학 화학공학과)
  • Published : 1995.04.01
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Abstract

Anisotropic pitch-based C-type and hollow carbon fibers can obtain wider shear stresses during the spinning and induce higher molecular orientation than that of round along the fiber axis. These fibers reinforced unidirectional epoxy composites were prepared by hot-press moulding method and perpendicular and parallel thermal conductivities of the composites were measured by a steady-state meth od. In the case of round carbon fibers reinforced epoxy composites(H-CF/EP), thermal anisotropic factor showed nearly 50, while those of H-CF/EP and C-CF/EP showed about 130 and 118, respectively. As a result, both H-CF/EP and C-CF/EP had an excellent directional thermal conductivity to distribute heat, above 200 %.

C형 및 중공형 탄소섬유는 방직(spinning)시 홀의 전단응력을 원형의 그것에 비해서 더 광범위하게 걸쳐받게 됨으로 분자배향을 고도로 유도할 수가 있다. 핏치계 이방성 중공 및 C형 탄소섬유 강화재의 축 횡방향 열전도도를 에폭시 모재 하에서 실험하였다. 열이방성 정도에 있어 원형 탄소섬유 보강재인 경우 50 정도 였으나, C형과 중공형 보강재는 최고치로 대략 130과 118 정도를 보임으로써 원형 강화재 보다 200%이상 우수한 열이방성을 보였다.

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References

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