“…Consequently, reducing CO 2 emissions and achieving carbon capture and utilization has drawn attention from all over the world. − Besides, CO 2 is a renewable, cheap, and abundant carbon–oxygen resource, , with it a range of high-value fine chemicals including small organic molecules (i.e., methanol, methane, , carbamates, ureas, , carbonates, formic acid, formaldehyde, , and oxazolidinones), as well as polymers (i.e., polyurethanes, polycarbonates, polyesters, and PUas) can be synthesized. , PUa, characterized by a backbone structure of –NH–C(O)–NH–, exhibits remarkable antisolvent resistance, wear resistance, corrosion resistance, and thermal properties due to the presence of bidentate hydrogen bonds among the urea groups . The production of CO 2 -based PUas via the polycondensation of CO 2 with various diamines, including aliphatic, alicyclic, or aromatic types, has garnered significant attention in recent years. ,, Moreover, a range of CO 2 -based PUas, encompassing linear PUas, cyclic PUas, PUa thermoplastics, and PUa hybrids, have been prepared by a two-step method to get rid of undesired water. ,− Especially, the properties of the synthesized PUa could be elaborately controlled or adjusted by varying the molar ratio and chemical structure of diamines. For instance, the PUa synthesized from 4,7,10-trioxa-1,13-tridecane diamine (TTD) is brittle and semicrystalline due to the presence of the ordered hydrogen bonding network .…”