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An approach to predict the shape-memory behavior of amorphous polymers from Dynamic Mechanical Analysis (DMA) data

Mechanics of Time-Dependent Materials volume 19, pages 87–93 (2015)Cite this article

Abstract

The prediction of shape-memory behavior is essential regarding the design of a smart material for different applications. This paper proposes a simple and quick method for the prediction of shape-memory behavior of amorphous shape memory polymers (SMPs) on the basis of a single dynamic mechanical analysis (DMA) temperature sweep at constant frequency. All the parameters of the constitutive equations for linear viscoelasticity are obtained by fitting the DMA curves. The change with the temperature of the time–temperature superposition shift factor (a T ) is expressed by the Williams–Landel–Ferry (WLF) model near and above the glass transition temperature (T g ), and by the Arrhenius law below T g . The constants of the WLF and Arrhenius equations can also be determined. The results of our calculations agree satisfactorily with the experimental free recovery curves from shape-memory tests.

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Acknowledgements

This work was financially supported by the grant TÁMOP-4.2.2.A-11/1/KONV-2012-0036 supported by the European Union and co-funded by the European Social Fund. This work was also supported by the European Union and the State of Hungary, co-financed by the European Social Fund, in the framework of TÁMOP-4.2.4.A/2-11/1-2012-0001 ‘National Excellence Program’ (S. K.).

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Authors and Affiliations

  1. Department of Applied Chemistry, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary

    Ákos Kuki, Katalin Czifrák, Miklós Zsuga & Sándor Kéki

  2. Department of Polymer Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111, Budapest, Hungary

    József Karger-Kocsis

Authors
  1. Ákos Kuki
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  2. Katalin Czifrák
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  3. József Karger-Kocsis
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  4. Miklós Zsuga
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  5. Sándor Kéki
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Correspondence to Sándor Kéki.

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Kuki, Á., Czifrák, K., Karger-Kocsis, J. et al. An approach to predict the shape-memory behavior of amorphous polymers from Dynamic Mechanical Analysis (DMA) data. Mech Time-Depend Mater 19, 87–93 (2015). https://doi.org/10.1007/s11043-014-9253-5

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  • DOI: https://doi.org/10.1007/s11043-014-9253-5

Keywords

  • Shape memory polymer (SMP)
  • Dynamic mechanical analysis (DMA)
  • Shift factor
  • Free recovery curve