Recent progress in CO2-based polyurethanes and polyureas

Synthesis of Novel Nonisocyanate Poly(imide-urea)s from CO2-based Polyureas

“…1−3 Besides, CO 2 is a renewable, cheap, and abundant carbon−oxygen resource, 4,5 with it a range of high-value fine chemicals including small organic molecules (i.e., methanol, 6 methane, 7,8 carbamates, 9 ureas, 10,11 carbonates, 12 formic acid, 13 formaldehyde, 14,15 and oxazolidinones 16 ), as well as polymers (i.e., polyurethanes, polycarbonates, polyesters, and PUas) can be synthesized. 3,17 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. 18 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.…”

“…18 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. 3,17,19 Moreover, a range of CO 2based PUas, encompassing linear PUas, cyclic PUas, PUa thermoplastics, and PUa hybrids, have been prepared by a twostep method to get rid of undesired water. 17,20−26 Especially, the properties of the synthesized PUa could be elaborately controlled or adjusted by varying the molar ratio and chemical structure of diamines.…”

“…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 .…”

Non-Isocyanate Synthesis of Aliphatic Polyurethane by BiCl3-Catalyzed Transurethanization Polycondensation

“…In addition, the reaction of amines with phosgenes generates corrosive hydrogen chloride as a byproduct, which requires the plant facilities to be heavily corrosion-resistant. As a substantial solution to these problems, various green polyurethane syntheses have been developed to prevent the use of phosgenes and/or isocyanates [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”