Synthesis and polymerization of naftoxazines containing Furan Groups: a strategy for obtaining new high-performance thermosets

: In this work, new monomers of naphthoxazines containing furan groups were synthesized and had their polymerization behavior studied. The monomers were characterized by FTIR and NMR (¹H and ¹³C) analysis Thermal analyzes (DSC and TGA) have shown that the naphthoxazines exhibit typical polymerization exothermic events with a good processing window, but nevertheless suffer significant mass losses at temperatures below the initial polymerization temperature. Thus, a catalyst (1 mol% MgCl₂) was used in order to allow the polymerization of the compounds prior to the mass loss events. The FT-IR analysis showed strong evidence of the formation of poly(naphthoxazines) and TGA analyzes showed that these polymers have high thermal stability, with high flame resistance with self-extinguishing properties (LOI> 28), which makes them attractive in the development of high performance materials. (author)