This ability is a remarkable advantage to produce fibers from semicrystalline polymers of high molecular weight where application of other spinning techniques is restricted . One of the key factors contributing to the success of obtaining fibers during electrospinning is selection of suitable solvent. In our earlier work, different solvent systems were applied, such as chloroform (CHCl3), methanol (MeOH), dichloromethane (DCM), dimethylformamide (DMF) and tetrahydrofurane (THF), for PBS-DLS 70-30 copolymers, and the best results were obtained using binary mixture of CHCl3/MeOH in 7/3 v/v ratio. Figure flat aluminum collector thus showing random orientation. Figure shows the fiber diameters and their distribution using Image J software. The results indicated that for copolymers containing 70 wt% of hard segment (and also containing PEG) the majority of fiber diameters were around 400 nm. Lower content of hard segments (and also lower crystallinity of PBS copolymers containing 60 wt% of hard segments) resulted in higher nanofibers diameters of 400-600 nm with the majority of 600 nm thick fibres for PBS-DLS-PEG 60-35-5 copolymer. Overall, all polymers proved to have high potential for electrospinning, thus resembling the native extracellular matrix .