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Mechanical behavior of shape memory fibers spun from nanoclay-tethered polyurethanes

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Abstract

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(ε- 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 thermomechanical 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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Authors and Affiliations

  1. Department of Materials Science and Engineering, Seoul National University, 151-742, Seoul, Korea

    Seok Jin Hong & Woong-Ryeol Yu

  2. Department of Advanced Fiber Engineering, Division of Nano-System, Inha University, 402-751, Incheon, Korea

    Ji Ho Youk

Authors
  1. Seok Jin Hong
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  2. Woong-Ryeol Yu
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  3. Ji Ho Youk
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Correspondence to Woong-Ryeol Yu.

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Hong, S.J., Yu, WR. & Youk, J.H. Mechanical behavior of shape memory fibers spun from nanoclay-tethered polyurethanes. Macromol. Res. 16, 644–650 (2008). https://doi.org/10.1007/BF03218574

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  • DOI: https://doi.org/10.1007/BF03218574

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