Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Q33: Dynamics of Polymers and Polyelectrolytes III
3:00 PM–6:00 PM,
Wednesday, March 6, 2024
Room: 102E
Sponsoring
Unit:
DPOLY
Chair: Laura-Roxana Stingaciu, Oak Ridge National Lab
Abstract: Q33.00010 : Tailoring Molecular Interactions in Acid-Tethered Polymers
4:48 PM–5:00 PM
Presenter:
Gyeong-Chan Kang
(Postech - South Korea)
Authors:
Gyeong-Chan Kang
(Postech - South Korea)
Moon Park
(Postech - South Korea)
relaxation of polymer chains. In this study, we report a methodology to decouple ion mobility from polymer relaxation by precisely manipulating intermolecular interactions within SPEs.
A set of mono-functional and bi-functional polymers, poly(3-sulfonic acid styrene) (PS3S), poly(4-sulfonic acid styrene) (PS4S), poly(3-sulfonic acid-4-hydroxyl styrene) (PS-3S4H),
and poly(3- hydroxyl-4- sulfonic acid styrene) (PS-3H4s) were synthesized by aqueous reversible addition−fragmentation chain transfer (RAFT) polymerization. By incorporating
non-stoichiometric ionic liquids, we discovered that the positioning of sulfonic acid groups significantly influenced their charging behavior and the strength of electrostatic interactions.
In particular, bi-functional PS-3S4H and PS-3H4S formed intra-monomer hydrogen bonds, weakening electrostatic interactions between acid moieties and embedded ionic liquids. This
approach significantly enhanced mechanical strength while enabling efficient ion transport in SPEs, establishing a design principle for superionic SPEs through tailored molecular
interactions.
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