Semibatch monomer addition as a general method to tune and enhance the mechanics of polymer networks via loop-defect control
Name
Semibatch monomer addition as a general method to tune and enhance the mechanics of polymer networks via loop-defect control
Size
1.4 MB
Format
Unknown
Checksum (MD5)
69ce2a990384074b1fb514995fd62390
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.
Date Issued
April 2017
Journal
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
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1073/PNAS.1620985114
