Evaluation of the efficiency of halogenated compounds in the rate of late combustion of ABS in order to produce flame retardant grades

Subject Areas : The Application of Chemistry in Environment

Behzad  Pourhassan Alafi ¹ (Faculty of Chemical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran.)
Behnaz  Memar Maher ² (Faculty of Chemical Engineering, Ahar Branch, Islamic Azad University, Ahar, East Azarbaydjan, Iran.)

Received: 2021-10-07 Accepted : 2021-12-14 Published : 2020-04-20

Keywords: Flame retardants of polymers, Halogenated flame retardants, Pyrolysis polymer,

Abstract :

Polymers have been substituted for metal in many applications due to their good mechanical and chemical properties, but their flammability has limited their use, and many studies have been performed to improve the flame retardancy of polymers. Thermal pyrolysis of polymers leads to the formation of highly reactive radical species • O •, H and • OH [3]. The first two species are mainly converted to hydroxyl radicals (• OH). OH's participation in the exothermic reaction provides the heat needed to spread the flame. Inhibition (• OH) prevents the flame from advancing. Halogen flame retardants, which produce radical halogens, release phosphate inhibitors that release HPO, PO, or PO2, inhibiting OH. To reduce the flammability of polymers, either the polymer structure can be manipulated or the surface coating of the polymer textiles can be barrier-layered. The flame retardant halogen in the produced samples weakens the mechanical properties compared to the observed grade. In flame retardant, as the percentage of halogenated flame retardant compounds in the polymer increases, the polymer flame retardant increases in approximately the same proportion.