Event Information
Metallo-supramolecular hybrid organogels: Towards self-repair in polymeric materials
- Abstract:
Traditional polymeric materials fail when exposed to repeated and prolonged strain. New mechanisms for extending the lifetime of polymeric materials are needed. We propose to extend polymer lifetime by creating a hybrid polymer network comprising both covalent and coordinating components. A covalent polymeric network was constructed with 2-hydroxyethyl methacrylate and 4-vinylpyridine. Bimetallic pincer Pd and Pt complexes were inserted into the network forming reversible metal-ligand bonds that cross-link pyridine residues. The mechanical properties of these hybrid networks were investigated using rheometry. It was shown that the additional bimetallic cross-links contribute to the overall stiffness of the network, and that the dynamic mechanical responses of the hybrid networks reflect the dissociation kinetics of the complexes. Further, the addition of the coordinative cross-linkers prolong the lifetime of the material under repeated compressive strain.
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