Epoxy modified with polymer-grafted GO: role of bimodal functionalization in formation of ordered structures

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F21%3A00544215" target="_blank" >RIV/61389013:_____/21:00544215 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0254058421007793?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0254058421007793?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matchemphys.2021.124996" target="_blank" >10.1016/j.matchemphys.2021.124996</a>

Result language
angličtina
Original language name
Epoxy modified with polymer-grafted GO: role of bimodal functionalization in formation of ordered structures
Original language description
The modification of epoxy with polymer-grafted graphene oxide (GO) is a radical alternative to mere combination of GO with a polymeric modifier. Here, this aspect is revealed for the case of bimodal grafting of GO with hydrophobic polybutadiene and hydrophilic polyoxypropylene or polyethylene glycol utilizing grafting-to approach to link different chains in the plane and edge area of GO. The results indicate fair ability of bimodally grafted GO to form ordered lamellar structures in epoxy. However, these structures show larger distance between less aligned GO plates in contrast to tightly aligned GO arrangement in case of single grafting. This is enabled by repulsive interactions between dissimilar chains. Such a structure with higher mobility of grafted chains has favorable effect on mechanical performance of epoxy. The effect of chain type and geometry of grafting is highlighted as well. Important finding is promotion of lamellar structure formation also by grafted low-m. w. compounds.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project
<a href="/en/project/GA19-06065S" target="_blank" >GA19-06065S: Upgrade of thermoset composites via self assembled structures based on modified carbon nanoplatelets</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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