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Polyhedral oligomeric silsesquioxane (POSS)-based epoxy nanocomposite involving a reversible Diels–Alder-type network as a self-healing material
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SYSNO ASEP 0549416 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Polyhedral oligomeric silsesquioxane (POSS)-based epoxy nanocomposite involving a reversible Diels–Alder-type network as a self-healing material Author(s) Strachota, Beata (UMCH-V) RID
Matějka, Libor (UMCH-V) RID
Hodan, Jiří (UMCH-V)
Kobera, Libor (UMCH-V) RID, ORCID
Mahun, Andrii (UMCH-V) ORCID
Dybal, Jiří (UMCH-V) RID, ORCID
Šlouf, Miroslav (UMCH-V) RID, ORCIDSource Title Journal of Adhesion Science and Technology. - : Taylor & Francis - ISSN 0169-4243
Roč. 35, č. 24 (2021), s. 2736-2757Number of pages 22 s. Language eng - English Country NL - Netherlands Keywords POSS ; epoxy nanocomposite ; physical crosslinking Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA19-04925S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000693272100001 EID SCOPUS 85114254109 DOI 10.1080/01694243.2021.1970367 Annotation Epoxy-polyhedral oligomeric silsesquioxane (POSS) nanocomposites were prepared by incorporating POSS nanofiller into the epoxy-amine network. The monofunctional epoxy-POSS monomer or nonfunctional octaphenyl POSS unit were applied to reinforce the epoxy network by producing the nanocomposite with chemically bound pendant POSS or physically admixed POSS. The combination of reactive and unreactive POSS, leads to a synergistic effect and to the most efficient reinforcement of the epoxy network. Both polymer-POSS and POSS–POSS interactions are present in the system and lead to a strong physical crosslinking through the path polymer-bound POSS-unbound POSS domain. The nanocomposite was modified by incorporation of the thermoreversible Diels–Alder (DA) type network. The produced interpenetrating network composed of the irreversible reinforced epoxy and the reversible DA networks exhibits an efficient self-healing capability. This strong nanocomposite, showing a modulus of 800 MPa at room temperature, was healed with an efficiency of 61%. The developed stiff nanocomposite is shown to be a promising material because self-healing of strong thermosets is still a big challenge. With the increasing content of POSS nanofiller and heterogeneity of the nanocomposite, however, the healing efficiency diminishes. The insufficient contact of crack surfaces due to involved inhomogeneities results in a worse sealing of the material crack. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address https://www.tandfonline.com/doi/full/10.1080/01694243.2021.1970367
Number of the records: 1