Solid-state NMR investigations of the pyrolysis and thermo-oxidative decomposition products of a polystyrene/red phosphorus/magnesium hydroxide system

Interaction between magnesium hydroxide and microencapsulated red phosphorus in flame‐retarded high‐impact polystyrene composite

“…That is to say, most MgO produced by degradation of MH has reacted with MRP and converted into amorphous magnesium phosphate compounds. This is correspondent with what is reported by Schartel et al in the literature . The result in Figure suggests that the incorporation of a small amount of MRP can activate the endothermic decomposition of MH in condensed phase.…”

“…Microencapsulated red phosphorus (MRP) is known to be a very efficient flame retardant, which can be used to decrease the flammability of hydrocarbons and polymers with heteroatoms . It has been reported that there is good synergism between MH and MRP on the flame retardancy of many polymers, such as EVA, polyethylene, polyamide 6, and high‐impact polystyrene (HIPS) . Schartel et al have conducted detailed investigations on the flame retardant mechanism and degradation residue structure of HIPS/MH/MRP composite .…”

“…[17][18][19] It has been reported that there is good synergism between MH and MRP on the flame retardancy of many polymers, such as EVA, 20 polyethylene, 21 polyamide 6, 22 and high-impact polystyrene (HIPS). [23][24][25][26] Schartel et al have conducted detailed investigations on the flame retardant mechanism and degradation residue structure of HIPS/MH/MRP composite. 23,24 It is found that significant amounts of phosphorus are retained in the condensed phase through a reaction of RP and MH to most amorphous phosphates.…”

“…[23][24][25][26] Schartel et al have conducted detailed investigations on the flame retardant mechanism and degradation residue structure of HIPS/MH/MRP composite. 23,24 It is found that significant amounts of phosphorus are retained in the condensed phase through a reaction of RP and MH to most amorphous phosphates. The formation of amorphous inorganic magnesium phosphates can act as an additional physical barrier to improve fire retardancy of the polymer composite.…”

The effect of different impact modifiers in halogen-free flame retarded polycarbonate blends – I. Pyrolysis

“…In particular interactions between phosphorous compounds and decomposition products of the polymer or other additives play a major role [11][12][13]. In several works it was proven that the action of phosphorous compounds can change from gas-phase to condensed-phase mechanisms and vice versa when the system is modified, for instance by replacing some compounds with others [8,[13][14][15][16][17]. Also, the gas-phase mechanism of BDP in PC/ABS is reported to be switched off by adding zinc borate [18].…”