Nano-modified epoxy: the effect of GO-based complex structures on mechanical performance

0523817 - ÚMCH 2021 RIV GB eng J - Článek v odborném periodiku
Kelnar, Ivan - Zhigunov, Alexander - Kaprálková, Ludmila - Krejčíková, Sabina - Dybal, Jiří - Janata, Miroslav
Nano-modified epoxy: the effect of GO-based complex structures on mechanical performance.
RSC Advances. Roč. 10, č. 19 (2020), s. 11357-11364. E-ISSN 2046-2069
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
Impakt faktor: 3.361, rok: 2020
Způsob publikování: Open access
https://pubs.rsc.org/en/content/articlelanding/2020/RA/D0RA00202J#!divAbstract

The application of nanofillers (NFs) in multicomponent polymer systems is accompanied by important structure-directing effects that are more marked in partially miscible systems, such as polymer-modified epoxy. This study deals with rubber-modified epoxy using different combinations of GO and amine-terminated butadiene-acrylonitrile copolymer (ATBN), including in situ and pre-made grafting. Moreover, GO grafted via planar epoxy groups or solely edge-localized carboxyls was used. It is shown that the grafted ATBN chains promote the assembly of GO-g-ATBN into nacre-mimicking lamellar structures instead of usual exfoliation in thermoplastics. This complex structure of elastically embedded GO leads to the best mechanical performance. It is obvious that a small concentration of the grafted polymer exceeds the contribution of a higher concentration of separately added ATBN. The results highlight the important effect of the degree of grafted chains and geometry of the internal structure of the self-assembled arrays and their effect on the mechanical performance.
Trvalý link: http://hdl.handle.net/11104/0308157