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Maleimide Self-Reaction in Furan/Maleimide-Based Reversibly Crosslinked Polyketones: Processing Limitation or Potential Advantage?
- Source :
- Molecules, Molecules, Vol 26, Iss 2230, p 2230 (2021), Molecules, 26(8):2230. MDPI AG
- Publication Year :
- 2021
- Publisher :
- MDPI, 2021.
-
Abstract
- Polymers crosslinked via furan/maleimide thermo-reversible chemistry have been extensively explored as reprocessable and self-healing thermosets and elastomers. For such applications, it is important that the thermo-reversible features are reproducible after many reprocessing and healing cycles. Therefore, side reactions are undesirable. However, we have noticed irreversible changes in the mechanical properties of such materials when exposing them to temperatures around 150 °C. In this work, we study whether these changes are due to the self-reaction of maleimide moieties that may take place at this rather low temperature. In order to do so, we prepared a furan-grafted polyketone crosslinked with the commonly used aromatic bismaleimide (1,1′-(methylenedi-4,1-phenylene)bismaleimide), and exposed it to isothermal treatments at 150 °C. The changes in the chemistry and thermo-mechanical properties were mainly studied by infrared spectroscopy, 1H-NMR, and rheology. Our results indicate that maleimide self-reaction does take place in the studied polymer system. This finding comes along with limitations over the reprocessing and self-healing procedures for furan/maleimide-based reversibly crosslinked polymers that present their softening (decrosslinking) point at relatively high temperatures. On the other hand, the side reaction can also be used to tune the properties of such polymer products via in situ thermal treatments.
- Subjects :
- Materials science
Diels-Alder
Side reaction
Pharmaceutical Science
Thermosetting polymer
maleimide homopolymerization
02 engineering and technology
010402 general chemistry
Elastomer
01 natural sciences
Analytical Chemistry
lcsh:QD241-441
chemistry.chemical_compound
lcsh:Organic chemistry
Furan
Polyketone
Drug Discovery
Polymer chemistry
maleimide self-reaction
Physical and Theoretical Chemistry
Self-healing material
Maleimide
chemistry.chemical_classification
Communication
thermo-reversibly crosslinked polymers
Organic Chemistry
Polymer
021001 nanoscience & nanotechnology
0104 chemical sciences
self-healing polymers
chemistry
Chemistry (miscellaneous)
Molecular Medicine
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 14203049 and 14315157
- Volume :
- 26
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Molecules
- Accession number :
- edsair.doi.dedup.....1e8e09057463fdb158b37481aaae48a3