Thermo-mechanical properties of polymer materials distinguish many properties that can be related to semi-crystallinity, blend and copolymer morphologies, and the class of materials (thermoplastic, thermoset, elastomer). The use of 3D printing to create prototypes and devices from polymeric materials has appended the design functionality for new materials including uses in biomedical devices enabling rapid development. While 3D printed polymers are known for their anisotropic thermo-mechanical properties, the use of CAD design to enable variable properties are also unique. The processability and functionality of rubbers and elastomers make it a challenge to employ 3D printing methods for additive manufacturing. The transition to a final phase or cross-linked structure results in new properties in combination with the processing method. This is more evident with the choices of 3D printing methodologies (FDM, SLA, SLS, VSP) which can make use of blended or formulated compositions. We have demonstrated the thermo-mechanical testing of the 3D printed PEEK, Polyamides, polyurethanes (TPU), 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 emphasize the thermo-mechanical properties of 3D printed objects and comparison with ASTM standards (tensile, flexural, compression, ultimate strength, etc.). The result is a demonstration of the importance of precursor and nancomposite methods which can be combined with the CAD design to produce high-performance and stimuli-responsive thermo-mechanical properties.

Thermo-mechanical properties of 3D printed polymers: Hierarchical materials and design

ACS Spring Meeting 2021

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