探讨了环氧树脂（EP）/笼型倍半硅氧烷（POSS）纳米复合材料的阻燃性能与热降解机理。利用锥形量热计研究了EP以及EP/POSS的燃烧行为,发现POSS可有效降低EP的热释放速率峰值以及总热释放。热失重-红外联用测试结果表明,虽然EP与EP/POSS热裂解产物种类相似,但EP/POSS气相产物均出现在较高温度下,这是由于POSS的存在延迟了EP热解产物的释放,并且在高温下形成了稳定性良好的含硅杂化炭层。此炭层可有效阻止热量与氧传递,从而在燃烧的过程中阻止下部材料进一步燃烧。
The morphology,thermal degradation and flame retardancy of epoxy（EP） composite containing polyhedral oligomeric silsesquioxane（POSS） were investigated using transmission electron microscopy,thermogravimetry（TG）,cone calorimeter and TG-Fourier transform infrared（FT-IR）.The cone results indicate that the use of POSS in EP can significantly decrease its peak heat release rate and total heat release.TG-FT-IR experiments present that the introduction of POSS in EP shows few effects on type of evolved gas products,but its gas products occur at higher temperature compared with EP.EP/POSS can form a stable char layer containing silicon at high temperature to protect underlying materials during combustion.
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