Effect of type and geometry of GO modification on formation of self-assembled structures in epoxy

0559678 - ÚMCH 2023 RIV PT eng C - Konferenční příspěvek (zahraniční konf.)
Kelnar, Ivan - Janata, Miroslav
Effect of type and geometry of GO modification on formation of self-assembled structures in epoxy.
Proceedings IRF2020. Porto: INEGI - Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, 2020 - (Silva Gomes, J.; Meguid, S.), s. 25-26. ISBN 978-989-54756-1-2.
[International Conference Integrity-Reliability-Failure (IRF2020) /7./. Funchal (PT), 06.09.2020-10.09.2020]
Grant CEP: GA ČR(CZ) GA19-06065S
Institucionální podpora: RVO:61389013
Klíčová slova: epoxy nanocomposites * mechanical properties * microstructure
Obor OECD: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
https://paginas.fe.up.pt/~irf/Proceedings_IRF2020/index.htm

Unlike thermoplastic nanocomposites-, where polymer grafting to GO mostly increases exfoliation, nacre mimicking lamellar arrays are formed in the case of epoxy. The reason is lower viscosity and absence of shearing forces together with positive effect of reaction-induced phase separation. The best-balanced mechanical performance in the case of lamellar structure indicates that the very low content of the grafted polymer has an effect comparable to much higher content of the added polymer. Results achieved reveal an important role of internal structure of elastically embedded arrays of GO platelets.
Trvalý link: https://hdl.handle.net/11104/0338354