keywords: Compressive strength, density, polyols, rigid polyurethane, vegetable oil
The palm and groundnut oil used for this study were bleached, fractionated and subjected to conventional method of synthesizing polyol from vegetable oil. The synthesized polyols were used for production of rigid polyurethane (RPU) foams through reaction with 2,4–diphenyl methylene diisocyanate (MDI) using two-shot method. The density, water absorptivity and compressive strength of the vegetable oil based RPU foams were better than those of the petrochemical based RPU foam. These results indicate that bio-based polyols have good potential for replacement of petroleum based polyols in synthesis of RPU foam as precursor in chemical and allied industries.
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