The PBS-DLS-PEG segmented copolymers were synthesized using a two-step process involving transesterification and polycondensation from the melt according the procedure already described in our previous work with the difference in a catalyst only. Briefly, the first step involved the transesterification of dimethyl succinate and 1,4-butanediol in a presence of Mg-Ti catalyst at 200 °C to obtain oligo(butylene succinate) (PBS) as the hard segments. In the second step, DLA-OH and PEG were added as components of soft segments along with the second portion of a catalyst, and the polycondensation was carried out at 240 °C and reduced pressure of 0.2 -0.4 mbar. The progress of a reaction was monitored by the increase of copolymer melt viscosity. The resulting polymer melt was extruded directly from the reactor into a water bath, which served as a cooling system and facilitated filament formation. To control the diameter of the filament, the speed of filament collection was adjusted through the rotating speed of the collector, while simultaneously monitoring the live diameter of the extrudate using a digital caliper with 0.01 mm accuracy (see video in Supplementary information). The target diameter of the filaments was set at 1.75 mm, which is a standard size for additive manufacturing using 3D printer. Two series of copolymers were synthesized with the theoretical weight ratio of the PBS (hard segments) to the DLS and set at 70-30 wt% and 60-40 wt%, respectively. PEG 6000 g/mol has been added at 5 wt.%. The final copolymers were abbreviated as 70-30-0, 70-25-05, 60-40-0 and 60-35-05 (PBS-DLS-PEG ratio). Figure represents a schematic of the synthesis and Table provides details related to the synthesis, including time and temperature at different stages.