Anthracene-based thiol-ene networks with thermo-degradable and photo-reversible properties
| Autor: | Jonas Van Damme, Bruno Van Mele, Guy Van Assche, Otto van den Berg, Joost Brancart, Carolien Huyck, Laetitia Vlaminck, Filip Du Prez |
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| Přispěvatelé: | Physical Chemistry and Polymer Science, Materials and Chemistry, Faculty of Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Dimer 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Inorganic Chemistry chemistry.chemical_compound Differential scanning calorimetry dynamic covalent networks SYSTEMS Phase (matter) Polymer chemistry Materials Chemistry Ene reaction chemistry.chemical_classification Anthracene Organic Chemistry Anthracene dimerization Dynamic mechanical analysis Polymer PHOTOCYCLOADDITION 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry Monomer self-healing polymers chemistry CLICK CHEMISTRY photoreversible bonds POLYMERS 0210 nano-technology CYCLOADDITION |
| Zdroj: | MACROMOLECULES |
| ISSN: | 0024-9297 1520-5835 |
| Popis: | Reversible networks based on an alkenefunctionalized dimer of 9-anthracenemethanol were synthesized by photoinitiated radical thiol ene polyaddition, using either a poly(dimethylsiloxane-co-propylmercaptomethylsiloxane) or a novel aliphatic trithiol synthesized from 1,2,4trivinylcyclohexane in a simple two-step procedure. The obtained networks were analyzed using differential scanning calorimetry, dynamic mechanical analysis, polarization microscopy, X-ray diffraction, and (photo)rheology. The two types of networks showed weak endothermic transitions between 50 and 60 degrees C, which proved to originate either from melting of a crystalline anthracene-dimer phase (trithiol network) or from a liquid crystalline phase (PDMS network) based on X-ray diffraction and polarization microscopy. Using rheology, both types of networks were shown to cleanly decompose into multifunctional anthracene monomers at temperatures above 180 degrees C. Irradiation of these anthracene monomers resulted in the formation of networks having similar physical properties as the original materials. |
| Databáze: | OpenAIRE |
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