Flame retardant and mechanism of vinyl ester resin modified by octaphenyl polyhedral oligomeric silsesquioxane
Flame retardant and mechanism of vinyl ester resin modified by octaphenyl polyhedral oligomeric silsesquioxane
复制标题
八苯基多面体低聚倍半硅氧烷改性乙烯基酯树脂的阻燃性能及机理
DOI：
10.1002/pat.4737
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发表时间：
2019-12
影响因子：
3.4
通讯作者：
Yang Rongjie
中科院分区：
文献类型：
--
作者：
Zhang Weiwei;Zhang Xin;Zeng Gaofeng;Wang Kang;Zhang Wenchao;Yang Rongjie
阻燃性是制约双酚A型乙烯基酯树脂（VER）复合材料应用的主要问题之一。研究了含八苯基笼型倍半硅氧烷（OPS）的VER复合材料的热稳定性和力学性能。随着OPS质量比的增加，VER/OPS复合材料的800°C残渣率和断裂强度提高，同时由于形成致密的碳/二氧化硅保护层，起到了阻隔传热传质的作用，其峰值热释放速率、总热释放量和总烟释放量逐渐降低。此外，采用XPS、TG-FTIR、GC-MS等分析手段对凝聚相和气相阻燃机理进行了研究。结果表明，OPS加入到树脂基体中后，气相产物的特征峰强度明显降低，部分特征基团保留在凝聚相中。因此，本工作的意义在于提供一种制备具有优异力学性能的阻燃VER复合材料的可选方法。
Flamability is one of the major issues for utilization of bisphenol A–type vinyl ester resin (VER) polymeric composites in practical applications. The thermal stability and mechanical property of VER composites containing octaphenyl polyhedral oligomeric silsesquioxane (OPS) were investigated and discussed in detail. With increasing the mass ratio of OPS, the residues yield at 800°C and bending strength at break of the VER/OPS composites were enhanced, accompanied with the gradually decreased values of the peak heat release rate, total heat release, and total smoke release due to the formation of dense carbon/silica protective layers that acted as a barrier to heat and mass transfer. In addition, the flame‐retardant mechanisms of condensed phase and gas phase were analyzed by XPS, TGA‐FTIR, and GC‐MS. The results showed that when OPS was incorporated to the resin matrix, the characteristic peaks intensity of the gaseous products was reduced obviously due to some of the characteristic groups still retained in condensed phase. Therefore, the significance of this work is providing an optional method to fabricate flame‐retarding VER composites with excellent mechanical properties.
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