LAUSR

Abstract A series of bio-based polyester polyols with hydroxyl chain end was prepared using eugenol as a renewable source and various renewable diacids such as dimer, sebacic, succinic, and maleic acids. The functional group transformations and structure of monomer and polyols were analysed by the spectroscopic techniques. The hydroxyl functional polyester polyols were reacted with methylene diphenyl diisocyanate (MDI) to obtain polyurethane (PU) coatings. The prepared PUs were used as anticorrosive coatings and their performance was checked by dipping and electrochemical methods against 3.5 % sodium chloride (NaCl) solution. The developed coatings revealed excellent physico-mechanical properties such as transparency, gloss, flexibility, and cross-cut adhesion. Surface morphology and thermal stability of PU coatings were examined under scanning electron microscopy (SEM), atomic force microscopy (AFM), and thermogravimetric analysis, respectively.