Article (Scientific journals)
Monocomponent non-isocyanate polyurethane adhesives based on a sol-gel process
Gomez-Lopez, Alvaro; Grignard, Bruno; Calvo, Iñigo et al.
2020In ACS Applied Polymer Materials, 2 (5), p. 1839-1847
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Keywords :
ring-opening polymerization (ROP); supercritical carbon dioxide; polyurethane; cyclic carbonate; network
Abstract :
[en] In the context of replacement of toxic conventional polyurethanes, non-isocyanates polyurethanes (NIPUs) based on 5-membered cyclic carbonates have emerged as the most promising alternatives. The low reactivity of conventional 5-membered cyclic carbonates has limited the preparation of one pot-based systems due to long curing times. This work focuses in the improvement and application of these materials as adhesives by the combination of the NIPU chemistry with the sol-gel process able to cure in the presence of humidity. Thus, NIPU prepolymers are functionalized with (3-aminopropyl)triethoxysilane (APTES) and their curing behaviour as well as their adhesion performance are investigated by rheology and lap-shear test respectively. In spite of the ability of alkoxysilane to cure under ambient conditions, our results show that to have better adhesion properties, catalyst and temperature must be used to speed up the curing process. Hence, it is demonstrated that the fastest curing and the best performance are achieved at 100°C when acetic acid is employed as catalyst. Finally we demonstrate the importance of the soft (poly(propylene glycol) dicarbonate) to hard (resorcinol dicarbonate) ratio to achieve superior cohesion and adhesion properties in NIPUs adhesives.
Research center :
Complex and Entangled Systems from Atoms to Materials (CESAM) Research Unit
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Gomez-Lopez, Alvaro;  University of the Basque Country, POLYMAT, Donostia - San Sebastián, Spain
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
Calvo, Iñigo;  ORIBAY Group Automotive S.L., R&D Department, Donostia - San Sebastián, Spain
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
Sardon, Haritz;  University of the Basque Country, POLYMAT, Donostia - San Sebastián, Spain
Language :
English
Title :
Monocomponent non-isocyanate polyurethane adhesives based on a sol-gel process
Publication date :
08 May 2020
Journal title :
ACS Applied Polymer Materials
eISSN :
2637-6105
Publisher :
American Chemical Society (ACS), Washington, United States - District of Columbia
Volume :
2
Issue :
5
Pages :
1839-1847
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
The BIODEC project
The HAZITEK project
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FEDER - Fonds Européen de Développement Régional [BE]
Walloon region [BE]
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since 27 March 2020

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