Processing and Characterization of Composites Based on Hybrid Thermosets Systems

Mohamed Dkier, Anne Blond, Claire Barrès, Jean-yves Charmeau
2020 Procedia Manufacturing  
Additive manufacturing techniques based on liquid resins, such as digital light processing (DLP), demonstrate higher resolution and accuracy than other printing techniques, but their applications have been hindered by the limited materials selection. Overall, there have been numerous successes in printing acrylic-epoxy resins but the final parts generally suffer from relatively poor mechanical properties. In this study, hybrid printable formulations that are based on acrylic-epoxy resins and
more » ... epoxy resins and ceramic filler are introduced and their printability on DLP machines is demonstrated. Here, we present an ultraviolet (UV) printed acrylic-epoxy with high Young modulus via a two-stage curing approach. Herein, different experiments are used to investigate the evolution of the materials properties during the post-process. Indeed, we conduct experiments to characterize the physico-chemical features and the evolution of mechanical properties before and after post-process. Finally we report the preparation of polymeric rapid tooling inserts with tailored mechanical and physical properties, which were used as injection molding cavities for prototyping and low volume production. Abstract Additive manufacturing techniques based on liquid resins, such as digital light processing (DLP), demonstrate higher resolution and accuracy than other printing techniques, but their applications have been hindered by the limited materials selection. Overall, there have been numerous successes in printing acrylic-epoxy resins but the final parts generally suffer from relatively poor mechanical properties. In this study, hybrid printable formulations that are based on acrylic-epoxy resins and ceramic filler are introduced and their printability on DLP machines is demonstrated. Here, we present an ultraviolet (UV) printed acrylic-epoxy with high Young modulus via a two-stage curing approach. Herein, different experiments are used to investigate the evolution of the materials properties during the post-process. Indeed, we conduct experiments to characterize the physico-chemical features and the evolution of mechanical properties before and after post-process. Finally we report the preparation of polymeric rapid tooling inserts with tailored mechanical and physical properties, which were used as injection molding cavities for prototyping and low volume production.
doi:10.1016/j.promfg.2020.04.116 fatcat:63pnf2wx7neytlv7yjmhr2ar2e