A bifunctional modifier endowing epoxy resin with outstanding flame retardancy and high impact strength. Issue 35 (21st April 2021) - Han, Yichen
Abstract: The flammability and brittleness are two major shortages of epoxy resin (EP). Normally, adding flame retardants can deteriorate the mechanical property of EP. Herein, in this work, a reactive flame retardant (DPPO‐TES) containing both Si and P was synthesized and incorporated into EP. When the content of P is only 1.0 wt%, the LOI of the modified EP (DPPO‐TES/EP) reaches to 33.2%, UL‐94 passes V0, THR and pk‐HRR are 377.6 kw/m 2 and 103.5 MJ/m 2, respectively, which is attributed to the high flame‐retardant efficiency in both condense phase and gas phase. In addition, the flexible SiOSi chains in the structure can significantly improve the impact strength of DPPO‐TES/EP. Therefore, as a bifunctional modifier, DPPO‐TES has a wide application prospect for EP materials. Abstract :