Figure 14.

Dual dynamic bulk IPN comprising disulfide and boronic ester DCBs [45]. (a) Structure of the disulfide (SN-SS) and the boronic ester (SN-PB) single networks. (b) Synthesis of the IPN. The single networks are mixed (1) and the dynamic bonds dissociate under the influence of heat and moisture (2) and interlock (3) when heating is stopped and moisture removed. The process is reversible through the specific hydrolysis of the boronic ester crosslinks in the presence of water (4 and 5). The individual networks can, thus, be separated (6). (c) Tensile properties of the single networks and the IPN. Due to the synergistic effects of the two interwoven networks, the strain is better distributed in the IPN, which leads to improved mechanical properties. Reprinted (adapted) with permission from Reference [45]. Copyright (2020) American Chemical Society.