HB mechanical properties. Although

HB mechanical properties. Although not as elastic as their pure polymer counterparts (fig. S3B), both HAPLGA and HAPCL retain a high degree of elasticity, capable of undergoing 36.1 ± 4.3% and 61.2 ± 6.4% strain and having similar tensile elastic moduli of 4.3 ± 0.4 MPa and 10.3 ± 1.3 MPa, respectively. Hot-melt–extruded and DCM-only solvent-based materials were too brittle to be accurately tested under ten- sion. Additionally, DCM-only solvent-based inks were exceptionally dif- ficult to 3D-print into high-fidelity multilayered structures because the extruded fibers dried too quickly and did not adhere well to previously deposited material, making multilayer 3D printing particularly difficult.