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Impact of the formulation of biosourced phenolic foams on their fire properties
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2018-04-09
C. Delgado-Sánchez, J. Sarazin, F.J. Santiago-Medina, V. Fierro, A. Pizzi, S. Bourbigot, A. Celzard

The fire retardance properties of rigid, biosourced phenolic foams derived from tannins, which are novel, environment-friendly thermal insulators, are essential before the latter can be applied to the building sector. In this work, tannin-based foams prepared from new formulations and using different foaming methods were investigated by thermo-gravimetric analysis (TGA), cone calorimetry, and pyrolysis combustion flow calorimeter (PCFC). It was found that the flammability strongly depends on the formulation, so that tannin foams perform very differently depending on the presence of surfactant and plasticiser and, more importantly, on their initial water content. Moreover, a good correlation was observed between TGA and PCFC results. Nevertheless, due to their highly resistant phenolic, crosslinked, polymer network, all materials released a quite low amount of hydrocarbon fuel during thermal decomposition, leading to low heat release rates and high ignition times, and thus providing very good fire retardance properties. Based on the above, the foam presenting the highest fire retardance was identified, confirming our conclusions about the role of the ingredients in the formulation.



中文翻译:

生物源酚醛泡沫的配方对其防火性能的影响

源自单宁的生物来源的硬质酚醛泡沫的阻燃特性是新颖,环保的绝热材料,在将其应用于建筑领域之前,必不可少。在这项工作中,通过热重分析(TGA),锥形量热法和热解燃烧流量热仪(PCFC)研究了由新配方制备并使用不同发泡方法的单宁基泡沫。已经发现,可燃性在很大程度上取决于配方,因此单宁泡沫的性能差异很大,这取决于表面活性剂和增塑剂的存在,更重要的是取决于其初始含水量。此外,在TGA和PCFC结果之间观察到良好的相关性。不过,由于它们具有高度抵抗力的酚醛,交联聚合物网络,所有材料在热分解过程中都会释放出非常少量的碳氢化合物燃料,从而导致低的热释放率和高的点火时间,从而提供了非常好的阻燃性能。基于以上所述,鉴定出呈现最高阻燃性的泡沫,证实了我们关于成分在配方中的作用的结论。

更新日期:2018-04-09
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