About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
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Presentation Title |
G-7: Mechanical Characterization of Stacked Single-Crystal of Polyethylene and Monolayer MoSe2 |
Author(s) |
Gang Feng, Dong Zhou, Henna Khosla, Scott Retterer, Bo Li |
On-Site Speaker (Planned) |
Gang Feng |
Abstract Scope |
Polymer single crystal (SC) is a key building block of semicrystalline polymers. However, experimental measurement of freestanding mono-lamella polymer SC has not been demonstrated. This is, in large part, due to the difficulties associated with manipulating freestanding individual mono-lamella SC because of its extremely low rigidity and low robustness. We demonstrate a new strategy to suspend a polymer SC by using a two-dimensional (2D) material (MoSe2) as backing. The hybrid stacks can be suspended over microholes. Nanoindentation was used to probe the suspended PE-SC/MoSe2 stack and MoSe2 monolayer. The results suggest the first experimentally-measured in-plane moduli of PE-SC and 2D MoSe2 as 32±3 GPa and 237±15 GPa, respectively. Such stacked unit represents an ultrathin structure of polymer-ceramic laminate and the idea can be applied to other laminated composite systems. Therefore, this research will pave the way to accurately measure the mechanical properties of polymer SCs and their composites. |
Proceedings Inclusion? |
Planned: |
Keywords |
Polymers, Mechanical Properties, Other |