About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior Related to Interface Physics IV
|
Presentation Title |
Viscoelastic and adhesion characterization of polymer blend nanocomposite thin films |
Author(s) |
Geeta Pokhrel, Morgan Chamberlain, David Bahr, Chelsea Davis, John Howarter |
On-Site Speaker (Planned) |
Geeta Pokhrel |
Abstract Scope |
Thin films of polymer/blends have applications in flexible electronics, coatings, and optics, whose properties are enhanced by adding nanofillers. However, characterizing complex compositions with the addition of more components is challenging. We fabricated thin films of polystyrene (PS) and polyisoprene (PI) blended with functionalized 2D boron nitride (BN) nanoplatelets. PS and PI create a pseudo-bicontinuous morphology with dispersed PS and continuous PI phases. BN mainly disperses within continuous PI phase and minority at the PS-PI interface. The compositions range from pure polymer blend to 25 vol.% BN. Polymer domains averaged 5 µm, while BN particles measured 200-500 nm in diameter and 10-20 nm in thickness. Film thickness increased from 200 nm (0% BN) to 450 nm (25% BN) as BN concentration increases. Nano-dynamic mechanical analysis was utilized to understand viscoelastic response of these thin films across frequencies. Post-imaging from Scanning Probe Imaging was used to visually assess any film deformation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Composites, Thin Films and Interfaces |