In this work, we presented the synthesis of a new sulphurated and phosphorous tri-functional epoxide resin. To reach this result, we proceeded to the synthesis, in a first stage, of a precursor of the epoxide matrix. In the second stage, it would consist in the fictionalization of the precursor by means of the épichloridrine. The microscopic characterization of the synthesized resin was confirmed by the Fourier Transform Infrared (FTIR) and by nuclear magnetic Résonnance (NMR) ¹H, ¹³C, ³¹P. The epoxy tri-functional polymer was then reticulated thermically by the methyl alcohol dianiline( MDA). Its reactivity towards resin was characterized by a rheologic study. The study of composite material by means of the thermo-gravimetric analysis allowed us to estimate and to estimate the character of the thermal degradation of this new macromolecular chain.

Keywords: rheologic Study, tri-functional sulphurated and phosphorous epoxide resin, microscopic characterization, thermo-gravimetric Study.