Epoxy-resin thermosets are known for their tunable and superior thermomechanical properties, making them suitable for a range of technological applications. Most notably, epoxies are used as adhesives and coatings in the automotive industry, as well as matrix materials in various composites. Their thermomechanical properties are determined by their covalently cross-linked molecular structure, which forms during the so-called curing or cross-linking process. During the curing process, typically a (liquid) mixture of epoxy pre-polymer and so-called hardener molecules reacts chemically to yield the final cured epoxy material. An example of such chemical reactions is shown in Scheme 1 for amine-based hardeners. For typical amine-based hardeners, the curing reaction proceeds via an addition reaction between an epoxide and a primary amine to give a hydroxyl group and a secondary amine. This secondary amine can further react with another epoxy group to give a tertiary amine and another hydroxyl group. To obtain a sufficiently crosslinked resin, the epoxy prepolymer needs to contain at least two epoxide groups, which can react with at least two different amine moieties of the hardener. Scheme 1. Amine based curing reactions of epoxy resins.