| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Fused Filament Fabrication of Polymer Blends with In Situ Layerwise Chemical Modifications |
| Author(s) |
Donald W Benza, Camden A. Chatham, Jonathon Baker |
| On-Site Speaker (Planned) |
Donald W Benza |
| Abstract Scope |
Additive manufacturing (AM) promises voxel-level control over both shape and material properties; however, voxel-level control over material properties is difficult to achieve. The authors present one uniquely AM approach to material property control: layerwise chemical modification via introduction of reactive species during fused filament fabrication. Layerwise chemical modification can be accomplished by introducing a reactive gas species, such as ozone, in close contact with the molten polymer extrudate during part fabrication. Such reactions are considered “surface” reactions as they are diffusion limited. The AM benefit is that repeated modification of layer-interfaces compounds the “surface modification” across every layer. This is especially profound when printing polymer blends that natively exhibit unique behaviors at interfaces. Chemical modification at each layer interface provides an opportunity to alter blend morphology towards compatibilization during manufacturing and providing another handle for spatial control of material properties in AM parts. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |