Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Mechanical, Thermal and Electrical Properties of Carbon Nanotube-Polyurethane Nanocomposites

탄소나노튜브-폴리우레탄 나노복합체의 역학적, 열적 및 전기적 성질

  • Jung, Min (Department of Textile Engineering, Konkuk University) ;
  • Cho, Jae-Whan (Department of Textile Engineering, Konkuk University)
  • 정민 (건국대학교 공과대학 섬유공학과) ;
  • 조재환 (건국대학교 공과대학 섬유공학과)
  • Published : 2004.04.01
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Abstract

Nanocomposites composed of thermoplastic polyurethane block copolymer (PU) and multi-walled carbon nanotube (CNT) were prepared by melt-compounding, and their mechanical and thermal properties were investigated along with electrical conductivity. Modulus of composites increased proportionally with increasing CNT content breaking stress tended to decrease except 1% CNT, and strain-at-break decreased gradually. However, composites using sonicated nanotube showed different mechanical behavior, and especially, their strain-at-break increased largely due to better dispersion of nanotube in PU. It was considered that tensile properties of composites were dependent on CNT content, dispersion of nanotubes in matrix, and phase separation between hard and soft segments of PU due to nanotube addition. With increasing CNT content, glass transition temperature and maximum loss tangent decreased and thermal stability improved. Also electrical conductivity increased to 10$^{-4}$ S/cm for the 3% CNT composite.

Keywords

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