Preparation of the scaffolds-forming solution
The polyesters had been dissolved in chloroform. The concentrations were adjusted (Table 1) so to obtain the viscosity of 350±50 cP. Polymers were dissolved in an organic solvent for 24 h at room temperature while stirring continuously with a magnetic stirrer. If pore precursors had been used, they were added to the polymer solution after the complete dissolution of the polyesters (minimum 24 h). PVP or PVP with the addition of Pluronic® were added in such amounts to keep an appropriate mass ratio to the polyester (Table 1). Next, the stirring was continued for the next 24 h.
Table 1. Scaffolds-forming solutions