Synthesis and Properties of Flame Retardant soybean Oil-based Polyol containing Phosphorus
In this paper,phosphorus containing soybean oil-based polyol-PPOA was prepared with epoxidized soybean oil(ESO)as a starting material and phenyl phosphonic acid as a ring opening agent.The chemical structure and physical parameters(hydroxyl value,molecular weight and viscosity)of soybean oil-based polyol PPOA were characterized by Fourier transform infrared spectroscopy(FTIR),nuclear magnetic resonance(1H NMR,31P NMR),chemical analysis and titration,gel permeation chromatography(GPC),and viscosity test.The FTIR results showed that the characteristic absorption peak of epoxy group in ESO disappeared at 845 cm-1 to 1 826 cm-1,and the characteristic peak of P=O appeared at 3 432 cm-1 and 1 170(1180)cm-1,which confirmed the molecular structure of polyol PPOA.The physical property test results showed that the hydroxyl value of polyol PPOA was 112.86 mg/g(KOH),Mn and Mw were 1 833 Da and 3 110 g/mol,respectively,and the viscosity was higher than that of epoxidized soybean oil and gradually decreased with the increase of temperature.
soybean oil polyolphosphorus contentviscosityhydroxyl value
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