<br>改性聚磷酸铵/天然矿物协同阻燃玉米秸秆/聚丙烯复合材料性能研究,Journal of Reinforced Plastics and Composites

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改性聚磷酸铵/天然矿物协同阻燃玉米秸秆/聚丙烯复合材料性能研究
Journal of Reinforced Plastics and Composites ( IF 2.3 ) Pub Date : 2024-08-30 , DOI: 10.1177/07316844241278136
Zihan Zhao ₁ , Lingyu Meng ₂ , Xiangrui Li ₁ , Chunfeng Li ₁ , Lei Le ₁ , Mingli Liu ₁

Affiliation

本工作采用熔融共混和热压方法制备了玉米秸秆/聚丙烯/改性聚磷酸铵复合材料（CS/PP/KAPP）。由于KAPP生产成本较高，且大量KAPP会降低木塑复合材料（WPC）的力学性能，因此采用天然矿物质替代部分KAPP来提高阻燃性能。结果表明，对于所有研究组，当超细蒙脱石用量为8.6 wt%时，共效阻燃剂的阻燃性能优于纯KAPP组。同时，所得复合材料的氧指数为30.2%，垂直燃烧等级为V-0。在其他组中，由于KAPP含量降低，复合材料的极限氧指数低于纯KAPP组。结果表明，三种共效阻燃剂在燃烧过程中形成致密的碳层。这提高了碳的形成速度并减少了烟雾和一氧化碳的释放。此外，这三种天然矿物质还具有良好的填充作用，增强了复合材料的力学性能，提高了其热稳定性，并降低了吸水率。

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Performance study of modified ammonium polyphosphate/natural mineral synergistic flame retardant corn straw/polypropylene composites

In the present work, corn straw/polypropylene/modified ammonium polyphosphate composites (CS/PP/KAPP) were prepared by employing melt blending and hot-pressing methods. Due to the high production cost of KAPP and the fact that a large amount of KAPP can reduce the mechanical properties of wood plastic composite (WPC), natural minerals were used to replace some of KAPP to improve the flame retardancy. The results showed that, for all the studied groups, when the amount of ultrafine montmorillonite was 8.6 wt%, the flame retardancy of the co-effective flame retardant was better than that of the pure KAPP group. Meanwhile, the obtained oxygen index of the composite was 30.2%, with a vertical combustion class of V-0. In the other groups, the ultimate oxygen indices of the composites were lower than that of the pure KAPP group due to the reduced content of KAPP. The results showed that the three co-effective flame retardants formed a dense carbon layer during combustion. This enhanced the rate of formation of carbon and reduced the release of smoke and carbon monoxide. In addition, the three natural minerals were found to play a good filling role, enhancing the mechanical properties of the composites, improving their thermal stability, and reducing their rates of absorption of water.

更新日期：2024-08-30

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