Embedded Shape-Memory Alloy Wires for Improved Performance of Self-Healing Polymers

Authors

  • Eva L. Kirkby,

    1. Laboratoire de Technologie des Composites et Polymères, Institut des Matériaux, CH-1015 Lausanne (Switzerland)
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  • Joseph D. Rule,

    1. Autonomic Materials Systems Group, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign Urbana, IL 61801 (USA)
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  • Véronique J. Michaud,

    1. Laboratoire de Technologie des Composites et Polymères, Institut des Matériaux, CH-1015 Lausanne (Switzerland)
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  • Nancy R. Sottos,

    1. Autonomic Materials Systems Group, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign Urbana, IL 61801 (USA)
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  • Scott R. White,

    1. Autonomic Materials Systems Group, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign Urbana, IL 61801 (USA)
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  • Jan-Anders E. Månson

    Corresponding author
    1. Laboratoire de Technologie des Composites et Polymères, Institut des Matériaux, CH-1015 Lausanne (Switzerland)
    • Laboratoire de Technologie des Composites et Polymères, Institut des Matériaux, CH-1015 Lausanne (Switzerland).
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Errata

This article is corrected by:

  1. Errata: Embedded Shape-Memory Alloy Wires for Improved Performance of Self-Healing Polymers Volume 18, Issue 17, Article first published online: 5 September 2008

  • The authors gratefully acknowledge the financial support of the Swiss National Science Foundation (contract no. 200020-1-5169) and of AFOSR Aerospace and Material Science Directorate (grant no. FA9550-05-1-0346). The authors thank Andrew Phillips for technical support and discussions.

Abstract

We report the first measurements of self-healing polymers with embedded shape-memory alloy (SMA) wires. The addition of SMA wires shows improvements of healed peak fracture loads by up to a factor of 1.6, approaching the performance of the virgin material. Moreover, the repairs can be achieved with reduced amounts of healing agent. The improvements in performance are due to two main effects: (i) crack closure, which reduces the total crack volume and increases the crack fill factor for a given amount of healing agent and (ii) heating of the healing agent during polymerization, which increases the degree of cure of the polymerized healing agent.

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