Events
Precise Bond Cleavage as a Tool to Characterize Polymer Networks by Prof. Jeremiah A. Johnson, Massachusetts Institute of Technology
Description:
Webinar
Precise Bond Cleavage as a Tool to Characterize Polymer Networks
Prof. Jeremiah A. Johnson
A Thomas Geurtin Professor & Associate Department Head
Department of Chemistry
Massachusetts Institute of Technology
Wednesday, March 19, Webinar at 6:00 PM Pacific time
Abstract
Covalently cross-linked polymer networks have a wide range of properties and corresponding applications, spanning from soft gels and rubbers for biomaterials and transportation to glassy thermosets for aerospace and renewable energy. Nevertheless, the insolubility of these materials renders molecular-level understsanding of their structure and topology difficult to determine using traditional methods, slowing the predictive design of next-generation materials with enhanced functions and circularity. This talk will highlight our efforts to leverage efficient synthetic methods and principles of physical organic chemistry to construct and deconstruct polymers, applying the latter as a tool to characterize previously hidden features of polymer network structure and enable new polymeric material functions. Experimental tools for measuring previously hidden topological features of cross-linked polymer networks will be described.1 Inspired by these results, new and simple strategies for enhancing the toughness2 and circularity3 of polymer networks will be introduced.
[1] M. Zhong et al., Science 2016, 353, 1264–1268.
[2] S. Wang et al., Science 2023, 380, 1248–1252.
[3] P. Shieh et al., Nature 2020, 583, 542–547.
Speaker Background
Prof. Johnson is the A. Thomas Geurtin Professor of Chemistry and Associate Head of the Department of Chemistry at MIT. He conducted undergraduate research with Prof. Karen L. Wooley at Washington University in St. Louis, receiving a B.S. in biomedical engineering with a second major in chemistry. He received a PhD in chemistry from Columbia University working with Prof. Nicholas J. Turro and Prof. Jeffrey T. Koberstein.
In 2011, following a Beckman Postdoctoral Fellowship at California Institute of Technology with Professors David A. Tirrell and Robert H. Grubbs, he began his independent career as Assistant Professor of Chemistry at MIT. He is currently a member of the MIT Program for Polymers and Soft Matter (PPSM), the Koch Institute for Integrative Cancer Research at MIT, and the Broad Institute of MIT & Harvard. He is Co-Founder of Window Therapeutics Inc. and Elementium Innovations Inc., both of which are based on technologies (co)developed in his laboratory at MIT. Prof. Johnson received a 2019 ACS Cope Scholar Award, the 2018 Macromolecules-
Prof. Johnson's extensive bio background are all available at his group web site:
DATE: Wednesday, March 19
Registration deadline: Tuesday, March 18, 1:00 PM.
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Webinar Timing: 6:00 PM.
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