The goal of this research was developing biodegradable and biocompatibile xylitol-based copolymers with im proved mechanical properties, and investigating the change in their thermal and chemical properties with
progress of the cross-linking process. Using a raw material of natural origin such as xylitol, a prepolymer was
obtained by esterification and polycondensation. Then, at subsequent stages of the crosslinking process in a
vacuum dryer, samples of materials were taken to determine the progress of the process using Fourier transform
infrared spectroscopy. The method of differential scanning calorimetry also defined changes in the ranges of
phase changes occurring at each stage of the crosslinking process. After the crosslinking process, ester materials
based on sebacic and succinic acid were characterized in terms of mechanical and surface properties.