ABSTRACT
Bio-renewable polyurethanes (PUs) are one of the most versatile class of materials today and are in demand as a high-performance industrial material due to universal availability and low cost. Certain bio-based polyol and PUs are prepared using sesame oil through epoxidation and ring opened by castor oil fatty acid. The PUs are prepared by polyols, and the isocyanates are prepared by polycondensation reaction. The prepared cross-linked polyol and PUs are characterised by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy, and the effect of cross-liking density and stability of the prepared polyols and PUs are investigated by thermal analysis. Vegetable oil-based PUs have been prepared using polyols and PUs synthesised from sesame oil with aromatic 4,4 methylene diphenyl diisocyanate (MDI) and aliphatic hexamethylene diisocyanate. The addition of chain extender MDI exhibits higher stability. The prepared bio-based PUs can be used for various applications such as, biomedical, aerospace, and energy storage devices.
