三聚氰胺基体改性剂改性的SBR / MMT复合材料的阻燃性能及机理,Journal of Applied Polymer Science

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三聚氰胺基体改性剂改性的SBR / MMT复合材料的阻燃性能及机理
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-02-24 , DOI: 10.1002/app.50632
Guojun Cheng _{1,

2} , Ziyue Xuan ₁ , Zhongfeng Tang ₃ , Shen Tian ₁ , Feixiang Sha _{1,

3} , Guoxin Ding ₁ , Xianglong Wan _{1,

2}

Affiliation

三聚氰胺季铵盐（MQAS）是一种新型的阻燃插层改性剂，用于制备阻燃有机蒙脱土（FOSM），并通过两辊混合和成型工艺将其添加到SBR中，以制备SBR / FOSM复合材料。通过各种方法研究了钠基蒙脱石（MMT）和MQAS的协同阻燃作用。SBR的LOI值仅为19.1％，而FOSM-4将SBR的LOI值提高到24.3％。锥形量热法测试表明，与SBR相比，SBR / FOSM的总放热和峰值放热率分别降低了81.39％和86.08％。改性后的MMT分析表明，MQAS的接枝率约为10％，MMT的层间间距增大了约20％。MQAS与MMT的协同作用，不仅有效地解决了纯SBR燃烧产生的剧烈液滴，而且避免了仅添加MMT的卷曲问题。炭的形态和TG-FTIR结果表明，FOSM在冷凝相和气相中具有双重阻燃性。无磷阻燃改性剂和MMT的协同阻燃作用将为阻燃弹性体复合材料开辟新的可能性。

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Flame‐retardant behavior and mechanism of the SBR/MMT composites modified by melamine matrix modifier

Melamine quaternary ammonium salt (MQAS), a novel flame‐retardant intercalation modifier, was used to prepare the flame‐retardant organic montmorillonite (FOSM), and which was added to SBR by a two‐roll mixing and molding process to prepared the SBR/FOSM composites. The synergistic flame‐retardant effects of sodium‐based montmorillonite (MMT) and MQAS were investigated by the various methods. The LOI value of SBR was only 19.1%, and FOSM‐4 increased the LOI value of SBR to 24.3%. The cone calorimetry test showed that compared with SBR, the total heat release and the peak heat release rate of SBR/FOSM were reduced by 81.39% and 86.08%, respectively. The analysis of MMT after modification showed that the grafting rate of MQAS was about 10% and the interlayer spacing of MMT was enlarged by about 20%. The synergy of MQAS and MMT not only effectively solves the violent droplet of pure SBR combustion, but also avoids the curling problem of only adding MMT. The char morphology and TG‐FTIR showed that FOSM had dual flame‐retardancy in the condensed phase and the gas phase. The synergistic flame‐retardant effect of phosphorus‐free flame‐retardant modifier and MMT will open up new possibilities for flame‐retardant elastomer composites.

更新日期：2021-04-02

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