Biobased, Creep-Resistant Covalent Adaptable Networks Based on β‑Amino Ester Chemistry

For this study, creep-resistant covalent adaptable networks were prepared by making use of the reversible β-amino ester chemical platform and starting from biobased raw materials with an overall biobased carbon content of >90%. The investigated materials were synthesized with different cross-linking densities in a solvent-free fashion. The applied building blocks consisted of an easily obtained acrylate, based on a biobased diol, and a commercially available biobased multifunctional amine. Following their synthesis, the materials were investigated with regard to their thermal, thermomechanical, and rheological properties, which were preserved after up to three reprocessing cycles. Moreover, the obtained elastomers showed high thermal stability, in combination with good reprocessability at 180 °C and excellent creep resistance at elevated temperatures of up to 120 °C.