Carbon nanotube (CNT) reinforced acrylonitrile-butadiene-styrene (ABS) composites fabricated using a fused deposition modeling approach were studied in terms of microstructure and mechanical performance. Insight into possible dissipation mechanisms present in these composites was studied by microstructure analysis using atomic force microscopy and scanning electron microscopy. Both static and dynamic mechanical tests were performed to evaluate both the effect of fillers and fabrication process on elastic properties and mechanical energy dissipation. Results from mechanical testing suggests the CNT fillers alter the dissipation mechanisms in the ABS matrix by constraining the butadiene rubber particles from deformation. In addition, the additive manufacturing process induces significant polymer chain/butadiene alignment in the printing direction which increases the stiffness of the material but decreases the energy dissipation capability. The results of this research provide insight into the effect of fillers and fabrication method on microstructure and mechanical response. This work lays the foundation for understanding and utilizing additive manufacturing in the design of composites with energy dissipation capability.
- Understand the effect of an additive fabrication method on the dynamic properties of polymers
- Comprehend the influence of nanoscale fillers on 3D printed parts