CO2-Blown Nonisocyanate Polyurethane Foams

CO2-Blown Nonisocyanate Polyurethane Foams

ACS Macro Letters

10.1021/acsmacrolett.3c00334

http://dx.doi.org/10.1021/acsmacrolett.3c00334

Ping Sen Choong, Yen Li Eunice Hui, Chen Chuan Lim

Inorganic Chemistry, Organic Chemistry, Polymers and Plastics, Materials Chemistry

19 July 2023

Choong, P. S., Hui, Y. L. E., & Lim, C. C. (2023). CO2-Blown Nonisocyanate Polyurethane Foams. ACS Macro Letters, 1094–1099. https://doi.org/10.1021/acsmacrolett.3c00334

Polyurethane (PU) foams are produced from toxic, petrochemical- and phosgene-derived isocyanates. Although nonisocyanate polyurethane (NIPU) has shown promise as a replacement for traditional PU, the synthesis of NIPU foams has not been widely studied due to the difficulties in replicating the foaming process of PU, in situ CO2 production through the hydrolysis of isocyanates. Hereby, we report the synthesis of amine-CO2 adducts and their CO2 adsorption–desorption characteristics under different conditions. The results show that the amine-CO2 adducts can exhibit up to 87% CO2 desorption at 60 °C after aminolysis with cyclic carbonate. The amine-CO2 adduct is used as both a foaming agent and a comonomer to obtain low-density foams (0.203–0.239 g·cm–3) after heating at 50–60 °C for 24–48 h. This marks the successful synthesis of in situ CO2-blown NIPU foams using an amine-CO2 adduct.

Publisher Copyright

This research is supported by core funding from: Career Development Fund
Grant Reference no. : C210812032

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Macro Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsmacrolett.3c00334

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