About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
|
Presentation Title |
Network Formation in Dual-Cure Resins for Direct Ink Write Carbon Fiber Composites |
Author(s) |
Michael Chandross, Eric Rothchild, Phillip Taylor, Joel Clemmer, EJ Broker, James Batteas, Hsu-Ming Lien, Filippo Mangolini, Kyle Nogales, Nekoda van de Werken, Gary Grest, Adam Cook, Leah Appelhans |
On-Site Speaker (Planned) |
Michael Chandross |
Abstract Scope |
Dual-cure resins enable direct ink-write of polymer composites by combining monomers with multiple curing mechanisms; the first is cross-linked during deposition to enable net-shape printing, while the second component is cured after printing to achieve desired properties. We present the results of molecular dynamics simulations of a dual-cure acrylate/epoxy system to understand the separate cure processes and their relationships to the properties of the final material. We investigate the effects of composition and cure rate on the network morphology of the polymer matrix to determine which aspects of the initial cure can lead to epoxy monomer segregation. We also study the alignment of fibers during both shear and extensional flow in order to develop optimal printing parameters (polymer rheology, nozzle geometry and print speed) to achieve the desired properties of the final parts. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 (SAND2022-1056 A). |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Computational Materials Science & Engineering, Polymers |