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首页> 外文期刊>Polymers for advanced technologies >Flame retardant epoxy composites with epoxy-containing polyhedral oligomeric silsesquioxanes
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Flame retardant epoxy composites with epoxy-containing polyhedral oligomeric silsesquioxanes

机译：用环氧的多面体低聚硅氧烷碳酸倍硅氧烷（含环氧）的阻燃环氧复合材料

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摘要

A kind of polyhedral oligomeric silsesquioxanes (POSS) containing the propoxyl-epoxy and phenyl groups (pr-ep-Ph-POSS) was synthesized via hydrolytic condensation reaction. Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry identified the structure of the pr-ep-Ph-POSS, including major caged Si6O9 (T6), Si10O15 (T10), Si12O18 (T12), etc. The pr-ep-Ph-POSS was applied into the epoxy resin to achieve EP/pr-ep-Ph-POSS composites. Thermogravimetric analysis indicated that EP/pr-ep-Ph-POSS showed excellent thermal properties than pure EP. The fire behaviors of EP/pr-ep-Ph-POSS composites were evaluated based on the cone calorimetry, limiting oxygen index (LOI), UL-94 vertical burning test, and smoke density test. The smoke density decreased by 30%, the LOI value reached to 26.4%, dripping was inhibited, and the peak of heat release rate decreased by 62%. X-ray photoelectron spectroscopy analysis and FTIR indicated that protective-barrier effect is the main flame-retardant mode of action for pr-ep-Ph-POSS, due to the formation of the Si-O-Si, Si-O-C, and Si-C condensed phase, which improve the thermal stability, strength, and integrity of the char layer.
机译：通过水解缩合反应合成含有丙氧基环氧和苯基和苯基（PR-EP-PH-PHOS）的一种多面体低聚体氧化锰（POSS）。傅里叶变换红外光谱（FTIR），核磁共振光谱和基质辅助激光解吸/电离飞行时间质谱法鉴定了PR-EP-PH-POLS的结构，包括主要笼养的Si6O9（T6），Si10O15 （T10），Si12O18（T12）等。将PR-EP-PH-POP施用于环氧树脂中以实现EP / PR-EP-PH-POPS复合材料。热重分析表明EP / PR-EP-PH-POPS表现出比纯EP的优异的热性能。基于锥形量热法评估EP / PR-EP-PHOS复合材料的火灾行为，限制氧指数（LOI），UL-94立式燃烧试验和烟雾密度测试。烟雾密度降低30％，达到达到26.4％，滴落的液体值抑制，热释放速率的峰值降低了62％。 X射线光电子能谱分析和FTIR表明，由于Si-O-Si，Si-OC和Si的形成，保护阻隔效应是PR-EP-PH-PH-POP的主要阻燃作用模式-C冷凝阶段，可提高炭层的热稳定性，强度和完整性。

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