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Ulrich Schubert1 Stefan Zechel1 Marcel Enke1 Stefan Götz1 Martin D. Hager1

1, Friedrich-Schiller-University Jena, Jena, , Germany

Metallo-supramolecular polymers are an interesting class of polymeric materials since they combine the typical character of metals and polymers leading to novel and outstanding features. Furthermore, metal-ligand interaction can feature a reversibility of the binding enabling the design of novel self-healing materials.[1]
For this purpose, terpyridine moieties were incorporated into the side chain of different copolymers using the RAFT polymerization technique.[2,3] Subsequently, metallo-supramolecular polymer networks were prepared by the addition of different metal salts.[4] The healing of the metallopolymers strongly depends on the chosen metal salt. In particular, the metal as well as the counter ion has a strong impact on the healing behavior.[3] Interestingly, the crosslinking with manganese(II) chloride resulted in the best scratch healing ability (Figure 1). Furthermore, the metallopolymers were studied by temperature-dependent rheological measurements and the supramolecular bond life-time (τb) was determined by the crossover of G' and G''. A correlation between the presence of the crossover as well as the ability to close cracks could be revealed. Thus, the mechanical properties could be correlated with the self-healing performance of supramolecular networks.[3]
[1] M. Enke, D. Döhler, S. Bode, W. H. Binder, M. D. Hager, U. S. Schubert, Adv. Polym. Sci.2016, 273,
59-112.
[2] M. Enke, R. K. Bose, S. Bode, J. Vitz, F. H. Schacher, S. J. Garcia, S. van der Zwaag, M. D. Hager, U. S.
Schubert, Macromolecules.2016, 49, 8418-8429.
[3] S. Bode, M. Enke, R. K. Bose, F. H. Schacher, S. J. Garcia, S. van der Zwaag, M. D. Hager, U. S.
Schubert, J. Mater. Chem. A2015, 3, 22145-22153.
[4] S. Götz, M. Abend, S. Zechel, M. D. Hager, U. S. Schubert, submitted.

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