Fibers and Polymers

The Korean Fiber Society (한국섬유공학회)
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The Effect of Multi-walled Carbon Nanotubes on the Molecular Orientation of Poly(vinyl alcohol) in Drawn Composite Films

  • Wang, Xiao (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Park, Soo-Young (Department of Polymer Science, Kyungpook National University) ;
  • Yoon, Kwan-Han (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Lyoo, Won-Seok (School of Textiles, Yeungnam University) ;
  • Min, Byung-Gil (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
  • Published : 2006.12.30
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Abstract

Poly(vinyl alcohol) (PVA)/multi-walled carbon nanotube (MWNT) composite films were prepared by casting a DMSO solution of PVA and MWNTs, whereby the MWNTs were dispersed by sonication. A significant improvement in the mechanical properties of the PVA drawn films was achieved by the addition of a small amount of MWNTs. The initial modulus and the tensile strength of the PVA drawn film increased by 30 % and 45 %, respectively, with the addition of 1 wt% MWNTs, which are close to those calculated from the rule of mixtures, and were strongly dependent upon the orientation of the PVA matrix. The mechanical properties, however, were not improved with a further increase in the MWNT content. The orientation of MWNTs in the composite was not well developed compared to that of the PVA matrix. This result suggests that the improvement of the molecular orientation of the PVA matrix plays a major role in the increase of the mechanical propeties of the drawn PVA/MWNT composite films.

Keywords

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