Divergent aminolysis approach for constructing recyclable self-blown nonisocyanate polyurethane foams

[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 :

Center for Education and Research on Macromolecules (CERM), Belgium
Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Belgium

Disciplines :

Materials science & engineering
Chemistry

Author, co-author :

Monie, Florent ^✱; University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium

Grignard, Bruno ^✱; University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium

Detrembleur, Christophe ^✱; University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit, Center for Education and Research on Macromolecules (CERM), Belgium

^✱ These authors have contributed equally to this work.

Language :

English

Title :

Divergent aminolysis approach for constructing recyclable self-blown nonisocyanate polyurethane foams

Publication date :

15 February 2022

Journal title :

ACS Macro Letters

eISSN :

2161-1653

Publisher :

American Chemical Society, United States - District of Columbia

Volume :

Issue :

Pages :

236-242

Peer reviewed :

Peer Reviewed verified by ORBi

European Projects :

H2020 - 955700 - NIPU - SYNTHESIS, CHARACTERIZATION, STRUCTURE AND PROPERTIES OF NOVEL NONISOCYANATE POLYURETHANES

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FWO - Fonds Wetenschappelijk Onderzoek Vlaanderen [BE]
EOS - The Excellence Of Science Program [BE]
The Walloon Region in the frame of the Win2Wal program for the ECOFOAM project
CE - Commission Européenne [BE]
UE - Union Européenne [BE]

Available on ORBi :

since 21 January 2022

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