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镁-钼-磷多组分阻燃剂的构建及其在软质聚氯乙烯复合材料中的性能

Construction of magnesium-molybdenum-phosphorus multi-component flame retardant and its performance in flexible PVC composites.

作者信息

Li Xue, Liu Xiaoyuan, Lv Zhihui, Dang Li

机构信息

School of Chemical Engineering, Qinghai University Xining 810016 China

Salt Lake Chemical Engineering Research Complex, Qinghai University Xining 810016 China.

出版信息

RSC Adv. 2025 Aug 22;15(37):30046-30061. doi: 10.1039/d5ra04341g.

DOI:10.1039/d5ra04341g
PMID:40860424
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12377343/
Abstract

To address the high flammability and toxic smoke emission of flexible PVC (fPVC), a magnesium-molybdenum-phosphorus multi-component flame retardant (MO@MH-PEPE) was constructed by surface-modifying self-synthesized molybdenum oxide-hybridized magnesium hydroxide (MO@MH) with phenolic epoxy phosphate ester (PEPE). Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) confirmed the chemical grafting of PEPE onto MO@MH P-O-Mg bonds, enhancing interfacial compatibility. When incorporated into fPVC, the fPVC/MO@MH-PEPE composite exhibited superior flame retardancy and smoke suppression: limiting oxygen index (LOI) increased to 32.0%, UL-94 reached V-0 rating, peak heat release rate (pHRR) and total smoke production (TSP) decreased by 47.16% and 75.15% compared with the fPVC/MH composite, respectively. The char residue yield (50.00 wt%) and graphitization degree significantly improved, attributed to Mo/Mo redox catalysis and phosphoric acid charring. Thermogravimetry analysis-FTIR (TGA-FTIR) revealed gas-phase flame inhibition HO dilution. Furthermore, PEPE modification optimized mechanical properties, increasing tensile and impact strength by 28.35% and 6.50% over fPVC/MO@MH, supported by SEM-proven interfacial adhesion. This work demonstrates a synergistic Mg-Mo-P system for high-performance fPVC composites.

摘要

为了解决软质聚氯乙烯（fPVC）的高易燃性和有毒烟雾排放问题，通过用酚醛环氧磷酸酯（PEPE）对自合成的氧化钼杂化氢氧化镁（MO@MH）进行表面改性，构建了一种镁-钼-磷多组分阻燃剂（MO@MH-PEPE）。傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）证实了PEPE通过P-O-Mg键化学接枝到MO@MH上，增强了界面相容性。当将其加入到fPVC中时，fPVC/MO@MH-PEPE复合材料表现出优异的阻燃性和抑烟性：极限氧指数（LOI）提高到32.0%，UL-94达到V-0等级，与fPVC/MH复合材料相比，峰值热释放速率（pHRR）和总烟雾生成量（TSP）分别降低了47.16%和75.15%。残炭产率（50.00 wt%）和石墨化程度显著提高，这归因于Mo/Mo氧化还原催化和磷酸炭化。热重分析-傅里叶变换红外光谱（TGA-FTIR）揭示了气相阻燃作用——HO稀释。此外，PEPE改性优化了力学性能，与fPVC/MO@MH相比，拉伸强度和冲击强度分别提高了28.35%和6.50%，SEM证明的界面附着力为此提供了支持。这项工作展示了一种用于高性能fPVC复合材料的协同Mg-Mo-P体系。

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本文引用的文献

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