Table II.

Representative Photopolymers Used in 3D Printing of Parenteral Constructs

Material	UV wavelength (nm)	Photoinitiator	Photoabsorber	Mechanical properties	Ref
PEGDA	405	LAP	Orange G dye	NA	[26, 182]
PEGDMA	315–400	Irgacure I-2959	NA	Compressive/storage modulus: 37–500 Pa/14–70 kPa	[69, 183, 184]
GelMA	365	LAP	NA	Young’s modulus: 31 kPa	[59]
PPF	365	Irgacure I-2959	NA	Compression/tensile stiffness: 394/463 N/mm	[60]

PEGDA, poly(ethylene glycol) diacrylate; PEGDMA, poly(ethylene glycol) methacrylate; GelMA, gelatin methacrylate; PPF, polypropylene fumarate