The use of 3D printing to create prototypes and devices from elastomeric and polymeric materials has appended the design functionality for new materials including uses in biomedical devices enabling rapid development While 3D printed polymers can be further classified into thermoplastics, thermosets, and elastomers based on their thermo-mechanical properties – new opportunities for multi-materials and composites are possible. The processability and functionality of thermosets and elastomers make it a challenge to employ using most 3D printing methods for polymer additive manufacturing. The transition to a final phase or cross-linked structure results in new properties in combination with the processing method. We have demonstrated the 3D printing of biomedical grade thermopolastic polyurethanes (TPU), epoxy, silicones, and rubberized epoxies. However, 4D printing allows the design of new materials and applications based on integrating the chemistry of conversion with the printing mode. In this talk, we will demonstrate the fabrication of multimaterials including thermosets and thermoset elastomers with concept objects and elastomeric actuators. This is based on the use of biomedical grade TPU melts and extruded viscous solutions. The result is an extrudable precursor and nancomposite elastomers which can be printed via viscous extrusion printing (VEP) or VSP and then converted to an elastomeric actuating materials with very high cyclic compressibility. Other works based on the use of SLA, SLS, FDM, towards high strength epoxy, silicones and nanocomposite materials will be discussed.

3D printing high performance nanocomposites, elastomers, and thermosets

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.