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首页> 外文期刊>Journal of Macromolecular Science. Physics >Synthesis of a Novel Flame Retardant and Its Synergistic Effect With a Phosphapheanthrene Flame Retardant in Polypropylene/Polyethylene Vinyl Acetate Blends
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Synthesis of a Novel Flame Retardant and Its Synergistic Effect With a Phosphapheanthrene Flame Retardant in Polypropylene/Polyethylene Vinyl Acetate Blends

机译：用聚丙烯/聚乙烯乙酸乙烯酯共混物中磷骨生阻燃剂的新型阻燃剂的合成及其协同效应

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摘要

A novel flame retardant (NSiB) containing nitrogen, silicon and boron was synthesized through reacting of N-(beta-aminoethyl)-gamma-aminopropyl trimethoxy-silane (KH-792) and boricacid. The structure of NSiB was characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy with energy dispersive spectrometry (SEM-EDS). The effects of NSiB on the flame retardancy and thermal behaviors of polypropylene (PP)/polyethylene vinyl acetate (EVA) blends were investigated by limiting oxygen index value (LOI), vertical burning tests (UL-94) and thermal gravimetric analysis tests (TGA). The results showed that the flame retardancy and thermal stability of PP/EVA blends were improved with the addition of NSiB. When 7.5wt% DOPO (phosphaphenanthrene) and 0.5wt% NSiB were incorporated, the LOI value of the PP/EVA blends was 26.9%, and the class V-0 of UL-94 test was passed, as compared to the LOI value of 22.4% and class V-2 of UL-94 test for 8.0wt% DOPO only and 16.7% and fail, respectively, for the PP/EVA blends alone. The char structure observed by SEM indicated that the surface of the char for the PP/EVA/7.5wt% DOPO/0.5wt% NSiB blends had a denser and continuous char structure when compared with that of the PP/EVA blends and PP/EVA/8.0wt% DOPO blends. These results indicated that there was a good synergistic effect for NSiB and DOPO.
机译：通过反应N-（β-氨基乙基）-γ-氨基丙基三甲氧基 - 硅烷（KH-792）和硼酸酸，合成了一种含氮，硅和硼的新型阻燃剂（NSIB）。 NSIB的结构的特征在于傅里叶变换红外（FTIR）光谱和扫描电子显微镜，具有能量分散光谱（SEM-EDS）。通过限制氧指数值（LOI），垂直燃烧试验（UL-94）和热重分析试验（TGA ）。结果表明，通过添加NSIB，改善了PP / EVA共混物的阻燃性和热稳定性。当掺入7.5wt％的DOPO（磷酸盐）和0.5wt％的NSIB时，与LOI值相比，PP / EVA共混物的LOI值为26.9％，并且UL-94试验的V-0 v-0对于PP / EVA混合物，仅22.4％的UL-94，UL-94的V-2的V-2仅测试8.0wt％，并且分别失败。 SEM观察到的炭结构表明，与PP / EVA共混物和PP / EVA相比，PP / EVA / 7.5wt％DoPO / 0.5wt％NSIB共混物的炭的表面具有更密集和连续的炭结构/8.0wt% dopo混合物。这些结果表明NSIB和D​​OPO存在良好的协同效应。

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