Synthesis and characterization of different soybean oil-based polyols with fatty alcohol and aromatic alcohol

Abstract In this article, five kinds of soybean oil-based polyols (polyol-E, polyol-P, polyol-I, polyol-B, and polyol-M) were prepared by ring-opening the epoxy groups in epoxidized oil (ESO) with ethyl alcohol, 1-pentanol, isoamyl p -tert-butylphenol, 4-methoxyphenol presence tetrafluoroboric acid as catalyst. The SOPs characterized FTIR, 1 H NMR, GPC, viscosity, hydroxyl numbers. Compared ESO, retention time is shortened, indicating that molecular weight increased. structure different monomers can significantly affect numbers SOPs. Due to large steric hindrance -hydroxyanisole, these three often undergo further dehydration ether reactions, which consumes polyols, thus forming dimers multimers; therefore, are much lower than polyol-E polyol-P. viscosity polyol-P polyol-M. A longer distance between molecules smaller intermolecular force makes dehydrate again. This generates dimer or polymers larger, greatly increases.