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首页> 外文期刊>Journal of Applied Polymer Science >Synergistic effect of phosphorus-containing nanosponges on intumescent flame-retardant polypropylene
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Synergistic effect of phosphorus-containing nanosponges on intumescent flame-retardant polypropylene

机译：含磷纳米海绵对膨胀型阻燃聚丙烯的协同作用

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A novel nanosponge (NS) was synthesized via the crosslinking of β-cyclodextrin with epoxy resin. Subsequently, a phosphorus-containing nanosponge (P-NS) was prepared by the absorbance of resorcinol bis(diphenyl phosphate) into the NS, and it was used as a synergistic agent of intumescent flame retardance in a polypropylene (PP)/melamine pyrophosphate/pentaerythritol composite. The synergistic effect between P-NS and the intumescent flame retardant (IFR) was investigated by thermogravimetry, limiting oxygen index (LOI) testing, vertical burning (UL-94) testing, cone calorimeter testing, and scanning electron microscopy (SEM). The results show that P-NS significantly improved the flame retardancy of the PP/IFR composite. When 3.0 wt % P-NS replaced the same amount of IFR in the composite, the LOI value increased from 29.0 to 32.5%, the UL-94 rating was enhanced from V-1 to V-0, and the peak heat release rate decreased substantially from 343 to 235 kW/m ~2. Simultaneously, the total heat release and mass loss rate decreased dramatically. Furthermore, the SEM results show that the quality of char formation of the PP/IFR/P-NS was superior to that of the PP/IFR composite.
机译：通过β-环糊精与环氧树脂的交联合成了一种新型的纳米海绵（NS）。随后，通过将间苯二酚双（磷酸二苯酯）吸收到NS中制备了一种含磷的纳米海绵（P-NS），并将其用作聚丙烯（PP）/三聚氰胺焦磷酸酯/中的膨胀阻燃剂的增效剂。季戊四醇复合物。通过热重分析，极限氧指数（LOI）测试，垂直燃烧（UL-94）测试，锥形量热仪测试和扫描电子显微镜（SEM）研究了P-NS与膨胀型阻燃剂（IFR）之间的协同作用。结果表明，P-NS显着提高了PP / IFR复合材料的阻燃性。当3.0 wt％的P-NS代替复合物中相同量的IFR时，LOI值从29.0增至32.5％，UL-94等级从V-1提高至V-0，峰值放热速率降低基本上从343到235 kW / m〜2。同时，总热量释放和质量损失率显着下降。此外，SEM结果表明，PP / IFR / P-NS的炭形成质量优于PP / IFR复合材料。

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