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Effects of addition of hindered phenol compounds to a segmented polyurethane with shape memory on mechanical yielding

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Abstract

The mechanical yielding behavior of the shape memory polyurethane (SMP) and its composite samples were investigated to verify the effect of addition of hindered phenol. The composite samples were prepared using SMP as matrix and hindered phenol (AO-80) as filler, and then tensile tests were carried out at a range of temperatures and with different fixed crosshead speeds. According to the tensile data at 25 °C, the yield stress was increased by adding AO-80. In terms of the Eyring theory, the activation volume of deformation units decreased with increase of the amount of AO-80 added. This is because the packing of the hard segments is enhanced by addition of AO-80. Consequently, it was suggested that the yield process is caused by the rotation of hard segment domains within the deformed plastic domains composed of glassy soft segments.

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Acknowledgement

The authors are grateful for the financial support for this work from SMP Technologies Inc.

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Authors and Affiliations

  1. Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma Campus, Kanazawa, Ishikawa, 920-1192, Japan

    Mizue Kuriyagawa, Takanobu Kawamura & Koh-hei Nitta

  2. SMP Technologies Inc., Sendagaya, Shibuya-ku, Tokyo, 151-0051, Japan

    Shunichi Hayashi

Authors
  1. Mizue Kuriyagawa
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  2. Takanobu Kawamura
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  3. Shunichi Hayashi
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  4. Koh-hei Nitta
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Correspondence to Koh-hei Nitta.

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Kuriyagawa, M., Kawamura, T., Hayashi, S. et al. Effects of addition of hindered phenol compounds to a segmented polyurethane with shape memory on mechanical yielding. J Mater Sci 46, 1264–1271 (2011). https://doi.org/10.1007/s10853-010-4910-9

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  • DOI: https://doi.org/10.1007/s10853-010-4910-9

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