Halogen‐free intumescent flame retardant acrylonitrile‐butadiene‐styrene/poly(ethylene terephthalate) blends

Abstract

The influence of ammonium polyphosphate (APP) with and without synergistic agents -aluminum hypophosphite (Al(H 2 PO 2 ) 3 ), epoxy resin (E-44), and Zeolite 4A -in acrylonitrile-butadiene-styrene/poly(ethylene terephthalate) (ABS/PET) blends was investigated. The limiting oxygen index (LOI) and UL94 tests were used to investigate flame properties. The results showed that APP with and without synergistic agents all improved the flame retardancy of ABS/PET systems. The ABS/PET/ APP þ 2 wt % Al(H 2 PO 2 ) 3 , ABS/PET/APP þ 2 wt % E-44, and ABS/PET/APP þ 3 wt % Zeolite 4A systems achieved the best flame retardancy rating of V0 and LOI values were 32, 34, and 30.5, respectively. The thermal degradation behaviors analyzed by thermogravimetric analysis (TGA) indicated APP mainly accelerated the degradation of PET and led to the increase of charring residues. Al(H 2 PO 2 ) 3 and E-44 resulted in synergistic effects on the charring process of ABS/PET/APP. SEM revealed that the intact, dense, and strong char layer formed on the surface of the ABS/PET/APP/ Al(H 2 PO 2 ) 3 (or E-44) system, which was significantly different from the loose and porous char layer of ABS/PET and ABS/PET/APP systems.

Use of zinc borate as the third component of a traditional brominated flame retardant system in acrylonitrile butadiene styrene

“…However, one of the main drawbacks of ABS is being profoundly flammable. In order to heal high flammability of ABS, halogenated, organophosphorus, and intumescent flame retardant compounds are utilized . Literature survey shows that addition of aromatic brominated flame retardants (BFR) with or without the contribution of antimony trioxide (AO) improves the flame retardancy of ABS remarkably.…”

Effect of ammonium polyphosphate and fillers on flame retardant and mechanical properties of recycled PET injection molded

“…The presence of talc improved thermal stability and obtain the formation of magnesium phosphate for preventing flammability of the composites. Zhao et al used APP and aluminum hypophosphite for improving flame retardancy of acrylonitrile‐butadiene‐styrene/PET blends.…”

“…Flame retardancy of RPET is important in injection molding products and various applications, which can prevent and decrease the risk of fire accident. Flame‐retardant materials and the fillers have been used for promoting flame retardancy of polymeric materials . Intumescent flame retardants such as ammonium polyphosphate (APP), pentaerythritol, and melamine compounds have been increasingly researched because of their effectives of fire protection and classified as non‐brominated flame retardant .…”

“…Flame‐retardant materials and the fillers have been used for promoting flame retardancy of polymeric materials . Intumescent flame retardants such as ammonium polyphosphate (APP), pentaerythritol, and melamine compounds have been increasingly researched because of their effectives of fire protection and classified as non‐brominated flame retardant . The incorporation of additives together with flame retardant presents the synergism for developing flammability of polymer composites .…”

“…Intumescent flame retardants such as ammonium polyphosphate (APP), pentaerythritol, and melamine compounds have been increasingly researched because of their effectives of fire protection and classified as non‐brominated flame retardant . The incorporation of additives together with flame retardant presents the synergism for developing flammability of polymer composites . Duquesne et al discussed on the effect of talc on fire‐retardant properties of intumescent polypropylene composites.…”