Polyurethane elastomers from polyols based on soybean oil with a different molar ratio

The aim of this work was to determination of the influence of different molar mass of used soybean oil (SO)- based polyols on the properties of tested polyurethane elastomers (PUR), with a different content of hard segments (HS). The chemical structure and degree of phase separation of tested materials were characterized via Fourier transform infrared spectroscopy (FTIR). The thermal properties were determined by thermogravimetry (TGA) and differential scanning calorimetry (DSC). The mechanical properties were tested by dynamic mechanical thermal analysis (DMTA) and by static tensile test. Also hardness and wear resistance were carried out. The replacement of the petrochemical polyol by soy-based polyol make changes in chemical constitutions and thermal decomposition of PURs. PURs with SO polyol with lower molar mass had a higher thermal resistance, mechanical and physico-mechanical properties.