A method to quantitatively assess the modes-of-action of flame-retardants

The assessment of the modes action flame retardants (FRs) and their quantification is a challenging issue. This study highlights that condensed phase efficiency ? can be assessed by combining different flammability tests (pyrolysis-combustion flow calorimeter PCFC, Limiting Oxygen Index LOI, cone calorimeter). Relations were proposed to calculate LOI pHRR in from several parameters including ?. A satisfying agreement between experimental values calculated ones found for set dozens FR-free polymers assuming = 1 (i.e. no phase).Then, was evaluated EVA/PE blends containing Aluminium TriHydroxyde (ATH) and/or Magnesium DiHydroxyde (MDH) ABS Ammonium PolyPhosphate (APP) DecaBromoDiPhenylOxide (DBDPO) flame-retardant compositions follow same relationships as those unfilled polymers. evolution (as well ?, i.e. combustion efficiency) FRs contribute discussion about possible synergy or antagonism FRs. Especially, an apparent synergism APP/DBDPO observed performance point view. Nevertheless, calculation ? challenges this conclusion.