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SM07.03.05 : Ionic Vitrimers Through Trans-N-Alkylation Covalent Exchanges

5:00 PM–7:00 PM Apr 3, 2018

PCC North, 300 Level, Exhibit Hall C-E

Description
Mona Obadia1

1, IMP Lyon1, Villeurbanne, , France

Exploiting exchangeable covalent bonds as dynamic cross-links affords a new class of polymer materials coined as vitrimers. These permanent networks are insoluble and infusible but the network topology can be reshuffled at high temperatures, thus enabling glass-like plastic deformation and reprocessing without depolymerization. We have developed functional and high-value ion conducting vitrimers that take inspiration from poly(ionic liquid)s which are unique polyelectrolytes with cationic and anionic groups included in the repeating unit. Tunable networks with high ionic content are obtained by the solvent- and catalyst-free polymerization of an α-azide-ω-alkyne monomer and concomitant quaternization of the resulting poly(1,2,3-triazole)s with a series of difunctional cross-linkers (Figure 1). Temperature-induced transalkylation exchanges between 1,2,3-triazolium cross-links and halide-functionalized dangling chains enable to recycle and reprocess these highly cross-linked permanent networks. These vitrimers can also be recycled by depolymerization with specific solvents able to displace the transalkylation equilibrium, and display a great potential for applications that require solid electrolytes with excellent mechanical performances and facile processing such as supercapacitors, batteries, fuel cells and perm-selective membranes.

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