Preparation and characterization of guar gum based polyurethanes.

Guar gum (plant-based polysaccharide) is a promising candidate with immense potential. It is used as emulsifier, thickener, stabilizer, and as binding agent in many industries. In the present project, it was planned to synthesize guar gum based polyurethanes by varying the amount of guar gum. Guar gum (GG) was used along with hydroxyl-terminated polybutadiene (HTPB) as soft segment, which was then reacted with isophorone diisocyanate (IPDI) to form PU pre-polymers. In last step, these –NCO terminated pre-polymers were extended with 1,4 butane diol as chain extender. The prepared polyurethane samples were then characterized by using FTIR , solid-state 1HNMR and X-ray diffraction (XRD). Thermal behavior of the samples was studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Results indicated that the incorporation of guar gum in PU backbone improved its thermal behavior and crystallinity. • Guar gum is a plant-based polysaccharide, promising candidates with immense potential. • Synthesis of guar gum based polyurethanes • The structure and morphology of the material was studied by FTIR , solid-state static 1HNMR, XRD. • Thermal behavior of the prepared PU samples was checked by TGA and DSC analysis. • Incorporation of guar gum in PU backbone improved its thermal behavior and crystallinity. [ABSTRACT FROM AUTHOR]