Figure shows the polarized light micrographs of spherulites from the synthesized copolymers crystallized from the melt. The formed spherulites exhibit a distinct ringed pattern, characterized by concentric bands, which arises from the irregular radial growth of fibrillar crystals. These fibrillar structures exhibit a textured appearance, with their alignment primarily oriented along the radial direction of the spherulites The clear difference can be seen in the morphology and size of the spherulites for the samples with different segmental composition. The spherulitic structures developed during crystallization of PBS-DLS 70-30 polymer (Figure A, higher magnification) demonstrate alternating bright and dark bands known as banded spherulites. Similar patterns have been observed for PBS-DLS copolymers of the same composition but synthesized with the use of lipase B from Candida antarctica (CALB). PBS-DLS 60-40 copolymers