Synthesis, Physico-Chemical Properties, and Spectroscopic Characterization of Phenolic Modified Castor Oil Based Polyol

Abstract

Physico-chemical properties and optical characterization of synthesized polyol explores the possibility to understand the mechanism and controlling the reaction parameters in a suitable manner during the production of polyurethane products. Castor (Ricinus Communis) is generally grown for its oil yielding seeds, which contains ricinoleic acid and only the oil with hydroxyl group in molecular structure due to this castor oil can be exploited as modified polyol. In the present study, castor oil has been modified with blending phenolic resin and reacted with diethanolamine (DEA) and diethyleneglycol (DEG) to synthesize the polyol. Various physico-chemical properties of synthesized polyol such as acid value, OH value, and moisture content have been measured. UV-VIS, FTIR and NMR spectroscopic studies of the synthesized castor oil based polyol are carried out. Optical properties such as absorption coefficient (α), extinction coefficient (k) and optical band gap (Eg) of polyols were determined. FTIR studies show the information of changes in the functional group with changing concentration of diethanolamine (DEA), diethyleneglycol (DEG), and phenolic resin (Ph. resin). Infrared spectroscopy (IR) is used to understand the characterization worth with suitable standards in view of chemical and structural characterization of synthesized polyol.