Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session M17: Structure, Dynamics, and Mechanics of Polymer Networks I
8:00 AM–10:36 AM,
Wednesday, March 16, 2022
Room: McCormick Place W-184BC
Sponsoring
Units:
DPOLY DSOFT DBIO
Chair: Gabriel Sanoja, The University of Texas at Austin
Abstract: M17.00007 : Controlling topology and mechanical properties of polymer networks through kinetics of gelation*
9:36 AM–9:48 AM
Presenter:
Aaliyah Z Dookhith
(University of Texas at Austin)
Authors:
Aaliyah Z Dookhith
(University of Texas at Austin)
Nathaniel A Lynd
(University of Texas at Austin)
Costantino Creton
(ESPCI Paris)
Gabriel E Sanoja
(University of Texas at Austin)
We gelled model poly(ethyl glycidyl ether) networks with two organoaluminum-based catalysts, and investigated the relationship between rate of gelation, network architecture, and mechanical properties. The key result is that slow gelation, as measured by the rate of polymerization, yields highly crosslinked, stiff, and brittle networks; whereas fast gelation, instead, results in loosely crosslinked, soft, and extensible ones. Controlling the mechanical properties through the rate of gelation serves to understand defect formation, and molecularly design soft materials.
*This project has been supported through the ERC under the European Union's Horizon 2020 Research and Innovation Program (Grant Agreement N° 695351 – Chemech) and the GES start up fund.
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