Chaoqun Zhang, Ying Xia, and Michael R. Kessler
Iowa State University
Several polyols with various functionalities were prepared from epoxidized soybean oil and castor oil-based fatty alcohol. The effects of reaction time, reaction temperature, ratios between epoxidized soybean oil and castor oil-based fatty diol on the structure, and rheological behavior of final polyols have been investigated. The Nuclear magnetic resonance, Fourier transform infrared spectroscopy, Gel permeation chromatography, and rheometry results showed that the functionalities, molecule weight, and viscosity could be tailored by controlling reaction conditions. Moreover, the role of solvents in the ring opening of epoxy groups was investigated. The mechanism of ring opening of epoxides was also discussed. Finally, polyurethanes were prepared from those polyols and isophorone diisocyanate and characterized by mechanical tensile test, differential scanning calorimetry, dynamic mechanical analyzer, and thermogravimeter.