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A Thermally Re-mendable Cross-Linked Polymeric Material

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Science  01 Mar 2002:
Vol. 295, Issue 5560, pp. 1698-1702
DOI: 10.1126/science.1065879

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Abstract

We have developed a transparent organic polymeric material that can repeatedly mend or “re-mend” itself under mild conditions. The material is a tough solid at room temperature and below with mechanical properties equaling those of commercial epoxy resins. At temperatures above 120°C, approximately 30% (as determined by solid-state nuclear magnetic resonance spectroscopy) of “intermonomer” linkages disconnect but then reconnect upon cooling, This process is fully reversible and can be used to restore a fractured part of the polymer multiple times, and it does not require additional ingredients such as a catalyst, additional monomer, or special surface treatment of the fractured interface.

  • * To whom correspondence should be addressed. E-mail: wudl{at}chem.ucla.edu

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