To perform differential scanning calorimetry (DSC), 3-5 mg of the polymer networks were weighed into aluminium DSC crucibles and heated to 200 °C from room temperature, after which the sample was cooled to -90 °C. With this uniformized thermal history, the samples were once again heated to 200 °C. All heating and cooling rates were constant at 10 °C min -1 . All reported transition temperatures and enthalpies were taken from the second heating cycle. Crystallinity calculations from obtained enthalpies are described in depth in the Supplementary Information (Chapter 5.1.1, Chapter 5.2). Polymer networks were either cured in bulk in the heated mold or 3D printed, as stated in each case.