| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sijbesma, Rintje Pieter
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2023Dynamic covalent networks with tunable dynamicity by mixing acylsemicarbazides and thioacylsemicarbazidescitations
- 2021Reversible crosslinking and fast stress relaxation in dynamic polymer networkscitations
- 2020Thermally Reversible Diels–Alder Bond-Containing Acrylate Networks Showing Improved Lifetimecitations
- 2009Preemptive healing through supramolecular cross-linkscitations
- 2007Supramolecular copolyesters with tunable propertiescitations
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article
Preemptive healing through supramolecular cross-links
Abstract
The ability of highly cross-linked thermoset materials to relax stresses by network chainsegment mobility above or just below Tg is generally limited. We describe materials in whichsome of the cross-links have been replaced by dimers of quadruple hydrogen bonding ureidopyrimidinone(UPy) moieties, which act as reversible cross-links. Materials based on mixturesof ??-caprolactone and L-lactic acid, and containing different ratios of covalent and UPy dimercross-links, were synthesized and their thermal and mechanical properties were tested byDifferential Scanning Calorimetry (DSC) and Dynamic Mechanical Analysis (DMA). Thepresence of reversible cross-links results in superior relaxation of stresses even below Tg, aswitnessed by the creep and stress relaxation behavior. These properties bode well for potentialapplications, e.g. in coatings technology.