Abstract :
[en] We report an approach to fabricate self-blown non- isocyanate polyurethane (NIPU) foams by capitalizing on the divergent chemistries of amines with cyclic carbonates?creating the polymer network?and thiolactone?delivering in situ a thiol that generates the blowing agent (CO2) by reaction with a cyclic carbonate. Multiple linkages (hydroxyurethanes, thioethers, and amides) are created within the polymer network by this domino process. This one-pot method- ology furnishes flexible to rigid foams with open-cell morphology at moderate temperature. The foams are easily repurposed into films or structural composites by thermal treatment, showing the first example of recyclable NIPU foams. Remarkably, both the formation and the recycling of the thermoset foams do not necessarily require the use of a catalyst. This facile and robust process is opening new avenues for designing more sustainable PU foams and offers new end-of-life options by facile material repurposing
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM), Belgium
Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Belgium
European Projects :
H2020 - 955700 - NIPU - SYNTHESIS, CHARACTERIZATION, STRUCTURE AND PROPERTIES OF NOVEL NONISOCYANATE POLYURETHANES
Name of the research project :
The Walloon Region in the frame of the Win2Wal program for the ECOFOAM project
Scopus citations®
without self-citations
29