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. 2026 Jul 17;12(29):eaed4780. doi: 10.1126/sciadv.aed4780

Fig. 5. 3D printing and depolymerization of upcycled materials.

Fig. 5.

(A) Photographs of 3D-printed “3DBenchy” and (B) “bridges and walls” test square. Scale bar, 1 cm. (C) Optical microscopy image of 3D-printed “bridges and walls” test square. Scale bar, 2 mm. (D) Bar chart comparing the measured width of wall features and surface area of square features on 3D-printed test square to those of the model. (E) Depolymerization of a BPreT network to yield monomeric BPreT using ZnOAc2/DMAP as a catalyst at 180°C. (F) 1H NMR spectrum of the recovered BPreT (400 MHz, 298 K, CDCl3).