Semibatch monomer addition as a general method to tune and enhance the mechanics of polymer networks via loop-defect control
Author(s)
Hore, Michael J. A.; Jordan, Alex M.; Korley, LaShanda T. J.; Gu, Yuwei; Kawamoto, Ken; Zhong, Mingjiang; Chen, Mao; Olsen, Bradley D; Johnson, Jeremiah A.; ... Show more Show less
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Controlling the molecular structure of amorphous cross-linked polymeric materials is a longstanding challenge. Herein, we disclose a general strategy for precise tuning of loop defects in covalent polymer gel networks. This "loop control" is achieved through a simple semibatch monomer addition protocol that can be applied to a broad range of network-forming reactions. By controlling loop defects, we demonstrate that with the same set of material precursors it is possible to tune and in several cases substantially improve network connectivity and mechanical properties (e.g., ∼600% increase in shear storage modulus). We believe that the concept of loop control via continuous reagent addition could find broad application in the synthesis of academically and industrially important cross-linked polymeric materials, such as resins and gels.
Date issued
2017-04Department
Massachusetts Institute of Technology. Department of Chemical Engineering; Massachusetts Institute of Technology. Department of ChemistryJournal
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences
Citation
Gu, Yuwei, et al. “Semibatch Monomer Addition as a General Method to Tune and Enhance the Mechanics of Polymer Networks via Loop-Defect Control.” Proceedings of the National Academy of Sciences, vol. 114, no. 19, May 2017, pp. 4875–80. © 2018 National Academy of Sciences
Version: Final published version
ISSN
0027-8424
1091-6490