Macromolecular Research

  • 제16권7호
  • /
  • Pages.644-650
  • /
  • 2008
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  • 1598-5032(pISSN)
  • /
  • 2092-7673(eISSN)
한국고분자학회 (The Polymer Society of Korea)
권호 표지

Mechanical Behavior of Shape Memory Fibers Spun from Nanoclay-Tethered Polyurethanes

  • Hong, Seok-Jin (Department of Materials Science and Engineering, Seoul National University) ;
  • Yu, Woong-Ryeol (Department of Materials Science and Engineering, Seoul National University) ;
  • Youk, Ji-Ho (Department of Advanced Fiber Engineering, Division of Nano-System, Inha University)
  • 발행 : 2008.10.31
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초록

This study examined the effect of nanoclays on the shape memory behavior of polyurethane (PU) in fibrous form. A cation was introduced into the PU molecules to disperse the organo-nanoclay (MMT) into poly($\varepsilon$-caprolactone) (PCL)-based PU (PCL-PU). The MMT/PCL-PU nanocomposites were then spun into fibers through melt-processing. The shape memory performance of the spun fibers was examined using a variety of thermo-mechanical tests including a new method to determine the transition temperature of shape memory polymers. The MMTs showed an improved the fixity strain rate of the MMT /PCL- PU fibers but a slight decrease in their recovery strain rate. This was explained by the limited movement of PU molecules due to the presence of nanoclays. The shape memory performance of the MMT/PCL-PU fibers was not enhanced significantly by the nanoclays. However, their recovery power was improved significantly up to a strain of approximately 50%.

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