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Effects of Low‐Load Boron/Silicon‐Based Graphene Oxide on Combustion and Thermal Degradation of Flame‐Retardant Unsaturated Polyester Resin
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-10-12 , DOI: 10.1002/mame.202000454 Junfei Li 1 , Ming Gao 2 , Yudong Zheng 1 , Yueping Guan 1 , Deqi Yi 3
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-10-12 , DOI: 10.1002/mame.202000454 Junfei Li 1 , Ming Gao 2 , Yudong Zheng 1 , Yueping Guan 1 , Deqi Yi 3
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A comparison of ammonium polyphosphate/montmorillonite nanocompound (AM) and a synergistic agent, boron/silicate‐based graphene oxide (B‐Si@GO), is performed in unsaturated polyester resins (UPR) on flammability and thermal properties. It is found that by the presence of 14.9 wt% AM and 0.1 wt% B‐Si@GO, the limiting oxygen indices value of 0.1 B‐Si@GO/flame‐retardant‐UPR (FRUPR) composites is increased to 28.5%, and the UL 94 rating of V‐0 is achieved. And, lower loading of B‐Si@GO is observed to improve char skeleton, resulting in better insulation of the char and decrease in heat release, and the synergism of AM and B‐Si@GO reduces the fire risk. Furthermore, by analyzing the pyrolysis behavior and mechanical properties of materials, B‐Si@GO significantly improves the effects of flame retardants on the thermal stability, decomposition activation energy, tensile strength, and elastic modulus of UPR. Finally, flame retardant mechanism and model are proposed on the basis of the analyses of thermal decomposition products and process, and residual char structural components. This work provides a solution to improve the flame retardancy of UPR without affecting its mechanical properties, and will be conducive to the development of its flame retardant mechanism.
中文翻译：
低负荷硼/硅基氧化石墨烯对阻燃性不饱和聚酯树脂燃烧和热降解的影响
在不饱和聚酯树脂（UPR）中，对多磷酸铵/蒙脱土纳米化合物（AM）和增效剂硼/硅酸盐基氧化石墨烯（B-Si @ GO）的可燃性和热性能进行了比较。发现通过存在14.9 wt％的AM和0.1 wt％的B-Si @ GO，0.1 B-Si @ GO /阻燃-UPR（FRUPR）复合材料的极限氧指数值增加到28.5％，并且达到了V-0的UL 94等级。而且，观察到较低的B-Si @ GO负荷可改善炭的骨架，从而改善炭的绝缘性并减少热量释放，并且AM和B-Si @ GO的协同作用可降低火灾风险。此外，通过分析材料的热解行为和机械性能，B-Si @ GO可显着改善阻燃剂对热稳定性的影响，UPR的分解活化能，抗张强度和弹性模量。最后，在分析热分解产物和过程以及残余炭结构成分的基础上，提出了阻燃机理和模型。这项工作为提高UPR的阻燃性而不影响其机械性能提供了解决方案，并将有助于其阻燃机理的发展。
更新日期：2020-12-15
中文翻译：
低负荷硼/硅基氧化石墨烯对阻燃性不饱和聚酯树脂燃烧和热降解的影响
在不饱和聚酯树脂（UPR）中，对多磷酸铵/蒙脱土纳米化合物（AM）和增效剂硼/硅酸盐基氧化石墨烯（B-Si @ GO）的可燃性和热性能进行了比较。发现通过存在14.9 wt％的AM和0.1 wt％的B-Si @ GO，0.1 B-Si @ GO /阻燃-UPR（FRUPR）复合材料的极限氧指数值增加到28.5％，并且达到了V-0的UL 94等级。而且，观察到较低的B-Si @ GO负荷可改善炭的骨架，从而改善炭的绝缘性并减少热量释放，并且AM和B-Si @ GO的协同作用可降低火灾风险。此外，通过分析材料的热解行为和机械性能，B-Si @ GO可显着改善阻燃剂对热稳定性的影响，UPR的分解活化能，抗张强度和弹性模量。最后，在分析热分解产物和过程以及残余炭结构成分的基础上，提出了阻燃机理和模型。这项工作为提高UPR的阻燃性而不影响其机械性能提供了解决方案，并将有助于其阻燃机理的发展。
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