Preparation and characterization of guar gum based polyurethanes

Area of Science:

• Polymer Science
• Materials Science
• Biomaterials

Background:

• Guar gum (GG), a plant-based polysaccharide, offers versatile industrial applications as an emulsifier, thickener, stabilizer, and binding agent.
• Polyurethanes (PUs) are widely used polymers with tunable properties.
• Exploring sustainable and bio-based additives for polymers is crucial for developing eco-friendly materials.

Purpose of the Study:

• To synthesize novel polyurethanes by incorporating varying amounts of guar gum.
• To investigate the effect of guar gum incorporation on the structural, thermal, and crystalline properties of polyurethanes.

Main Methods:

• Guar gum (GG) and hydroxyl-terminated polybutadiene (HTPB) were used as soft segments.
• Isophorone diisocyanate (IPDI) was reacted to form PU pre-polymers.
• Pre-polymers were chain-extended using 1,4-butane diol.
• Characterization involved FTIR, solid-state 1HNMR, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC).

Main Results:

• Successful synthesis of guar gum-based polyurethanes was achieved.
• FTIR, 1HNMR, and XRD confirmed the successful incorporation of guar gum into the polyurethane structure.
• TGA and DSC analyses demonstrated improved thermal stability and enhanced crystallinity in the guar gum-modified polyurethanes.

Conclusions:

• The incorporation of guar gum into the polyurethane backbone significantly enhances its thermal properties.
• Guar gum acts as a reinforcing agent, improving the crystallinity of the resulting polyurethanes.
• This research highlights the potential of using guar gum as a sustainable component in polyurethane synthesis for advanced material applications.