The placement of reversible chemical bonds enables designed dynamic properties in polymeric materials, achieving self-healing properties as a new design-principle in material science. Whereas dynamic effects are well predicted in the presence of solvents or within gels, engineering dynamic effects in solid polymer materials is considerably more difficult.<br/>We do report two chemical principles to introduce a time-dependent response in solid materials: hydrogen bonds, engineered to reversibly cluster/decluster can introduce transient networks in polymers, in turn achieving self-healing by dynamic reorganization of chemical bonds. A detailed model is discussed, clearly presenting the mechanism of dynamics during the force-induced bond-rupture and reorganization.<br/>A second principle is based upon metal-carbene complexes, where pressure is inducing rupture of metal-carbenes, which in turn can be used for an internal stress- and friction detection within a solid polymer. The system is developed as a fluorescence-based stress detection system in polymers.

Self-healing and mechanochemical response in polymers: Hydrogen bonds and metal-carbene-complexes

254th National Meeting (2017)

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