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Poster (Scientific congresses and symposiums)
Sustainable poly(hydroxyurethane)s thermoset adhesives for affixing metals
Panchireddy, Satyannarayana; Grignard, Bruno; Thomassin, Jean-Michel et al.
2018Green Chemistry and Technology
 

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Keywords :
coating
Abstract :
[en] In the last five years, isocyanates-free polyhydroxyurethanes (PHUs), synthesized by step-growth polymerization between bis-cyclic carbonates and di- or poly-amines, have emerged as a novel class of polyurethanes (PUs). These PHUs find promising applications in flooring, paints, as thermoset materials or (thermal insulation) foams. PHUs can be also exploited advantageously for designing the next generation of high performance polyurethane adhesives. Thanks to the presence of pendant hydroxyl groups favoring the polymer/substrate interactions, the adhesion performances of PHUs may equal or even surpass the ones of conventional PUs. In this contribution, we focused on the design of novel reinforced bio- and CO2-based PHU thermosets adhesives with high shear adhesion strength for metal substrates (aluminum and stainless steel). The research included: The synthesis of a library of bi- or multifunctional 5-membered cyclic carbonates by coupling CO2 with (bio-based) epoxidized precursors using a novel home-made binary organocatalyst highly performant under very mild experimental conditions. The development of solvent-free reinforced PHU thermoset adhesives from various cyclic carbonate/amine/functional fillers formulations. For all formulations, curing kinetics was monitored by rheology to determine the gelation time and the thermo-mechanical and physico-chemical properties of PHUs were evaluated on free-standing films. The evaluation of the adhesives performances for metal sticking: The adhesion of (reinforced) PHUs onto Al-2024-T3 or stainless steel substrates was evaluated by standard cross-cut adhesion (5B) and MEK double rubber (>300) tests and shear adhesion strength (>16 MPa).
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Panchireddy, Satyannarayana ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Grignard, Bruno ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Thomassin, Jean-Michel ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Jérôme, Christine  ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ;  University of Liège (ULiège), Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Sustainable poly(hydroxyurethane)s thermoset adhesives for affixing metals
Publication date :
20 June 2018
Event name :
Green Chemistry and Technology
Event place :
Dublin, Ireland
Event date :
18/06/2018 - 20/06/2018
Audience :
International
Name of the research project :
CO2Green project
Flycoat project
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Walloon region [BE]
Commentary :
This poster was presented by Satyannarayana Panchireddy
Available on ORBi :
since 23 October 2018

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