Journal
MACROMOLECULES
Volume 51, Issue 23, Pages 9816-9824Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.8b01976
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Funding
- Center for direct Conversion of Biomass to Biofuels (C3Bio), an Energy Frontiers Research Center (EFRC) - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC000097]
- University of California, Santa Barbara
- Mellichamp Academic Initiative in Sustainability
- MRSEC Program of the National Science Foundation [NSF DMR 1121053]
- NSF
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A method for preparing reprocessable epoxy thermoset is presented. The process is composed of synthesis of a bisphenol monomer bridged by an imine bond, glycidylation of the bisphenol, and cross-linking with a hardener to form thermoset. The resulting epoxy thermoset possesses comparable properties to conventional high-performance thermosets made from bisphenol A. However, when treated by a stimulus like acid, temperature, and/or water, the described thermoset exhibits reprocessability. Degradation and recycling involve hydrolysis and re-formation of imine bonds; reshaping and repairing of the thermoset are realized through imine exchange reactions. All the described processes require no metal catalyst, press heating, or additional monomer, which significantly widens thermoset reprocessing.
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