The reversibility of a covalent bond is a precondition for the design and synthesis of novel self-healing materials. Acylhydrazones and ureas can feature such a dynamic behavior. Consequently, polymer networks based on either acylhydrazones or sterically hindered ureas were prepared. Subsequently, the self-healing ability was investigated using scratch and bulk healing experiments. Those analysis revealed materials with excellent mechanical properties (E-modulus &lt; 0.3 GPa) and still the possibility to heal mechanical failure, which is a rather unusual behavior in case of self-healing materials. Furthermore, the molecular mechanism was studied using diverse techniques such as Raman and FT-IR-spectroscopy. These measurements revealed a dynamic behavior behavior of the material, which is based on exchange reactions between the functional groups during thermal treatment. Consequently, these materials can be classified as vitrimers.

Acylhydrazones and ureas: Reversible bonds as starting point for the design of self-healing materials

254th National Meeting (2017)

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