The 3d printing biomaterial space is ruled by petrochemicals-based materials, particularly photopolymers resins where often toxic solvents and reagents have previously been required. Here, a simple solvent-free, radical polymerization is utilized to homo- and copolymerize limonene and β-myrcene monomers to produce oligomeric photopolymers (<i>M</i><sub>n</sub> &lt; 11 kDa) displaying Newtonian, low viscosities (~10 Pa × s) suitable for thiol-ene photocrosslinking yielding photoset materials in a digital light processing (DLP)-type 3D printer. The resulting photosets display tunable thermomechanical properties (poly(limonene) displays elastic moduli exceeding 1 GPa) compared with previous works focusing on monomeric terpenes as well as 4D shape memory behavior. The utility of such photopolymers for biomedical applications is briefly considered on the premise of the hydrophilic nature (measured by contact angle) as well as their cytocompatibility upon seeding films with macrophages. These terpene-derived, green 4D photopolymers are shown to have promising physical behaviors suitable for an array of 3D printing and biomedical applications.

4D printable terpene photopolymers from limonene and β-myrcene for use as a biomaterial

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