Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 137, Issue 20, Pages 6492-6495Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b03551
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Funding
- U.S. Department of Energy, Division of Materials Sciences [DE-FG02-04ER46162]
- National Science Foundation [DMR-1217651]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1217651] Funding Source: National Science Foundation
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Despite numerous strategies involving dynamic covalent bond exchange for dynamic and self-healing materials, it remains a challenge to be able to tune the malleability and self-healing properties of bulk materials through simple small molecule perturbations. Here we describe the use of tunable rates of boronic ester transesterification to tune the malleability and self-healing efficiencies of bulk materials. Specifically, we used two telechelic diboronic ester small molecules with variable transesterification kinetics to dynamically cross-link 1,2-diol-containing polymer backbones. The sample cross-linked with fast-exchanging diboronic ester showed enhanced malleability and accelerated healing compared to the slow-exchanging variant under the same conditions. Our report demonstrates the possibility of transferring small molecule kinetics to dynamic properties of bulk solid material and may serve as a guide for the rational design of tunable dynamic materials.
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