The as-prepared hexagonal a-ZrP nanoplatelets exfoliated by Jeffamine M1000 were uniformly dispersed in bisphenol-A based benzoxazine monomer.  After thermal cure, transparent polybenzoxazine (PBa) nanocomposites were obtained with enhanced thermal stability and flame retardancy. The attainment of good dispersion of exfoliated a-ZrP nanoplatelets in PBa matrix was confirmed by TEM. SEM images of char residues revealed honeycomb-like inner structures with compact outer surfaces. EDS and XPS analyses of char layers proved that a-ZrP was involved in the charring process that led to the formation of a stable and compact char layer, with rich flame retardant elements.  TGA-FTIR analysis revealed that exfoliated a-ZrP inhibited the release of flammable gases in the gaseous phase. This work paved a new path for the design and synthesis of well-dispersed polymer nanocomposites with improved thermal stability and flame retardancy.

Design and preparation of flame retardant polybenzoxazine nanocomposites

256th National Meeting (2018)

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