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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Polyhedral oligomeric silsesquioxane (POSS)-based epoxy nanocomposite involving a reversible Diels–Alder-type network as a self-healing material Tvůrce(i) 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, ORCIDZdroj.dok. Journal of Adhesion Science and Technology. - : Taylor & Francis - ISSN 0169-4243
Roč. 35, č. 24 (2021), s. 2736-2757Poč.str. 22 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova POSS ; epoxy nanocomposite ; physical crosslinking Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science CEP GA19-04925S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000693272100001 EID SCOPUS 85114254109 DOI 10.1080/01694243.2021.1970367 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2022 Elektronická adresa https://www.tandfonline.com/doi/full/10.1080/01694243.2021.1970367
Počet záznamů: 1