Mechanical properties and flame-retardant of PP/MRP/Mg(OH)2/Al(OH)3 composites

Synergistic flame retardant effect of BiFeO3 in intumescent flame‐retardant polypropylene composites

“…This bond inhibit P element generates small gas molecules evaporate into the gas phase, so that more P remain in the solid phase to form an expansion char layer, increasing the content of the effective expansion of char layer . When the sample contains 33.3% of BiFeO 3 , char residue appeared Bi characteristic diffraction peaks without significant BiPO 4 diffraction peaks, indicating that the sample did not produce BiPO 4 , and generating BiPO 4 crystal is not very good. This indicates that higher mass ratio BiFeO 3 with APP is not conducive to the formation BiPO 4 , and does not help to improve the content of the active expansion of the char structure.…”

“…When the sample contains 33.3% of BiFeO 3 , char residue appeared Bi characteristic diffraction peaks without significant BiPO 4 diffraction peaks, indicating that the sample did not produce BiPO 4 , and generating BiPO 4 crystal is not very good. This indicates that higher mass ratio BiFeO 3 with APP is not conducive to the formation BiPO 4 , and does not help to improve the content of the active expansion of the char structure. The above data suggest that BiFeO 3 and APP/ PER in a suitable mass ratio can react to form an appropriate amount of BiPO 4 , and thus improve the effective expansion of the char structure to increase flame retardant properties.…”

“…As can be seen from the figure, when the sample contain 3.3% or 10% of BiFeO 3 , char residue of sample appeared BiPO 4 characteristic diffraction peaks in 22.88, 25.18, 30.68, 39.28, 42.98, and 47.98. However, the sample contains 10% of BiFeO 3 having a sharper peak of BiPO 4 . This shows that at 5008C, BiFeO 3 can react with APP/PER system to form BiAOAP bond between the decomposition products of APP.…”

Influence of morphology and compatibilizer on burning behavior of PET/HDPE blend

“…Sonnier et al [1] found a relation between morphology and fire behavior in binary blend, where the heat release rate and limiting oxygen index (LOI) of blends significantly changed in the range of phase inversion. Liang et al [7] mentioned that linear burning rate depends on the thickness of specimens and the flame spreads mainly on the surface of specimens. Walters and Lyon [11] established a relationship between molar group contribution, heat-release capacity and ignitability of plastics.…”

“…Polymer blends are widely used in automotive-, construction-, and electronic industry, where burning behavior can be a main criterion of application [4]. Nevertheless, plastics are easily flammable, which implies, it is important to enhance the fire resistance by using flame retardant [5,6] and nanofillers [7,8], or control the forming morphology in order to maximize the performance [1,9]. It should be mentioned that despite our extensive research, we did not find any papers which have examined the effects of compatibilizers on fire behavior of polymer blends.…”