CO2-Blown Nonisocyanate Polyurethane Foams

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CO2-Blown Nonisocyanate Polyurethane Foams
CO2-Blown Nonisocyanate Polyurethane Foams
Journal Title:
ACS Macro Letters
Publication Date:
19 July 2023
Choong, P. S., Hui, Y. L. E., & Lim, C. C. (2023). CO2-Blown Nonisocyanate Polyurethane Foams. ACS Macro Letters, 1094–1099.
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.
License type:
Publisher Copyright
Funding Info:
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
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