Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 1, Issue 5, Pages 992-995Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am900104w
Keywords
self-healing materials; Diels-Alder reaction; polymer composites; healing mechanism; reaction kinetics
Funding
- U.S. Army Research Laboratory [W911NF-06-2-0013]
- National Science Foundation [DGE-0654313]
- Graduate Research Fellowship
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The Diels-Alder reaction was used to develop a reversibly cross-linking gel as a healing agent for traditional epoxy-amine thermosets. Direct application of the reversibly cross-linking network to a crack surface in an epoxy-amine thermoset resulted in the recovery of 37% of the initial epoxy-amine network's strength. Composites in which the reversibly cross-linking gel was incorporated as a secondary particulate phase recovered 21% of the initial composite strength after the first healing cycle, with healing possible up to five times.
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