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首页> 外文期刊>Journal of Applied Polymer Science >Synergistic effect of amino silane functional montmorillonite on intumescent flame-retarded SEBS and its mechanism
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Synergistic effect of amino silane functional montmorillonite on intumescent flame-retarded SEBS and its mechanism

机译：氨基硅烷功能蒙脱石对膨胀型火焰迟钝SEB的协同作用及其机制

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摘要

A functional modified montmorillonite (F-OMMT) was prepared by intercalating pristine montmorillonite using phosphonium salt and subsequent grafting through alkyl amino silane coupling. The synergistic effect of F-OMMT on the flame retardancy and char-forming mechanism of intumescent flame-retarded polystyrene-b-(ethylene-co-butylene)-b-styrene (SEBS) composite (SEBS/IFR) was investigated. When 2 wt % F-OMMT was introduced to the SEBS/IFR composite, the limited oxygen index (LOI) value of the composite increased from 24.9% to 26.9%, and the peak heat release rate significantly reduced according to microscale combustion calorimeter (MCC) test. The outer char demonstrated that F-OMMT produced dense and intact nanoparticles with a stabilised graphite structure. Meanwhile, F-OMMT helped form a crosslinking network containing large amounts of P, O, N, and Si in the char layer. Along with IFR, the amino functional group on the clay released nonflammable ammonia in the gaseous phase, the enhanced blowing effect can overcome the high-viscosity resistance of SEBS, more intumescent coating with strengthened clay platelets was then produced. In addition, the tensile properties of SEBS/IFR/F-OMMT composite increased evidently for the good dispersion effect. F-OMMT can serve as an effective and environmentally friendly additive for SEBS/IFR composite. (C) 2017 Wiley Periodicals, Inc.
机译：通过使用鏻盐再加工原始蒙脱石并随后通过烷基氨基硅烷偶联剂接枝来制备官能改性的蒙脱石（F-OMMT）。研究了F-OMMT对膨胀型火焰延迟聚苯乙烯-B-（乙烯 - 仲丁烯）-B-苯乙烯（SEBBS）复合（SEBS / IFR）的燃烧性和炭形成机制的协同作用。当将2wt％F-OMMT引入SEBS / IFR复合材料时，复合材料的有限氧指数（LOI）值增加到24.9％至26.9％，并且根据微观燃烧量热计（MCC）显着减少峰值热释放速率） 测试。外焦炭证明，具有稳定的石墨结构的F-OMMT产生的致密和完整的纳米颗粒。同时，F-OMMT帮助形成了Char层中包含大量P，O，N和Si的交联网络。随着IFR，粘土上的氨基官能团在气相中释放不易燃氨，可以克服SEBS的高粘度抗性，然后制备具有强化粘土血小板的更高膨胀型涂层。此外，SEBS / IFR / F-OMMT复合材料的拉伸性能显然增加了良好的分散效应。 F-OMMT可作为SEBS / IFR复合材料的有效和环保的添加剂。 （c）2017 Wiley期刊，Inc。

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