Synthesis, Characterization, and Properties of New Phosphorus-Containing Epoxy Resins

Four new phosphonate-epoxy monomers were synthesized and characterized by 1H and 31PNMR, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDITOFMS), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC) tools. Beside the expected compund, the formation of a small amounts of linear oligomers was also observed by MALDI-TOF MS. These monomers were used to prepare new phosphoruscontaining epoxy resins in order to obtain potential flame retardant polymers. The thermal behavior of these new epoxy resin was studied by DSC, TGA, and direct pyrolysis mass spectrometry (DPMS). TGA and DPMS data show that either the maximum decomposition temperature (PDT) or the onset of the thermal degradation of the phosphorus-containing epoxy resins is lower than that of the corresponding nonphosphonate samples.