Polyurethane nanocomposites with click‐coupled nanodiamonds exhibiting enhanced mechanical and shape memory effects |
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| Authors: | Hye Jin Yoo Byung Hak Lee Sibdas Singha Mahapatra Cheol-Min Yang Jae Whan Cho |
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| Affiliation: | 1. Department of Organic and Nano System Engineering, Konkuk University, Seoul, Republic of Korea;2. Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeollabuk‐do, Republic of Korea |
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| Abstract: | Poly(?‐caprolactone)diol (PCL)–functionalized nanodiamonds (f‐NDs) were synthesized using a click chemistry reaction between the azide‐moiety PCL and alkyne‐moiety NDs and were incorporated into shape memory polyurethane (PU) at f‐ND concentrations of 0, 0.5, 1, and 2 wt % to produce high‐performance shape memory nanocomposites. The PU/f‐ND nanocomposites exhibited better shape recovery, shape recovery stress, and breaking stresses than pure PU. Shape recovery of greater than 95% was demonstrated for all the nanocomposites in the third cycle, and the shape recovery stresses increased significantly with the f‐ND content. These enhanced mechanical and shape recovery properties are ascribed to increased interactions between the f‐NDs and PU matrix due to incorporation of click‐coupled f‐NDs. The click‐coupled NDs can be used as nanofillers to enhance the mechanical and shape memory properties of polymers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45465. |
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| Keywords: | composites graphene and fullerenes mechanical properties nanotubes polyurethane |
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