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首页> 外文期刊>Polymers for advanced technologies >Blowing-out effect and temperature profile in condensed phase in flame retarding epoxy resins by phosphorus-containing oligomeric silsesquioxane
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Blowing-out effect and temperature profile in condensed phase in flame retarding epoxy resins by phosphorus-containing oligomeric silsesquioxane

机译：含磷低聚倍半硅氧烷在阻燃环氧树脂中的凝结效果及爆破温度

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摘要

A series of flame retardant epoxy resins (EPs) containing phosphorus-containing oligomeric silsesquioxane are prepared, and an interesting blowing-out effect is detected in flame retardant EPs. The temperature profiles show that blowing-out effect slows the heat transfer from the fire to the unburned matrix; furthermore, this blowing-out effect can even take away some heat from the surface zone by the spurting gases. The thermo gravimetric analyzer and Fourier transform infrared spectrometer result shows that the spurting gases during the blowing-out effect have a high content of CO_2, which could reduce the combustion capability of the jetting gases. The flame retardancy of these EPs is tested by limit oxygen index and UL-94. The incorporation of 2.5 wt% phosphorus-containing oligomeric silsesquioxane into EP gives a remarkable blowing-out effect, which results in a significant enhancement of limit oxygen index value and UL-94 rating. The flame retardancy mechanism of blowing-out effect is quite different from the traditional mechanisms. The char strength and morphology of EP composites are also investigated to explain the mechanism of the blowing-out effect.
机译：制备了一系列包含含磷低聚倍半硅氧烷的阻燃环氧树脂（EPs），并且在阻燃EP中检测到有趣的喷出效果。温度曲线表明，吹散效应减慢了从火到未燃烧基质的热传递;此外，这种吹散效果甚至可以通过喷射气体从表面区域带走一些热量。热重分析仪和傅里叶变换红外光谱仪的结果表明，喷出过程中喷出的气体中CO_2含量较高，可能会降低喷射气体的燃烧能力。这些EP的阻燃性通过极限氧指数和UL-94进行测试。将2.5重量％的含磷低聚倍半硅氧烷掺入EP中具有显着的喷出效果，这导致极限氧指数值和UL-94等级的显着提高。燃尽效应的阻燃机理与传统机理大不相同。还研究了EP复合材料的炭强度和形态，以解释吹出效应的机理。

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