Multiwall carbon nanotubes (CNT) or montmorillonite clay (MMT‐30B) were added to a poly(hexamethylene isophthalamide‐co‐terephthalamine) (an amorphous polyamide ‐ aPA) and styrene‐ethylene/butylene‐styrene graphitized with maleic anhydride (SEBS) blend, in different concentrations, in order to investigate the morphology, thermal properties and flammability behavior. Different nanoparticle localizations in the phase blend were observed through transmission electronic microscopy. CNT nanoparticles are localized in SEBS phase, and MMT‐30B nanoparticles in aPA phase. No significant changes were observed on transition temperatures and thermal stability with both nanoparticle additions. However, a slight increase on storage modulus for clay nanocomposites and a slight reduction for carbon nanotube nanocomposites were observed, due to their different phase localizations. Regarding flammability, CNT nanocomposites showed better performance as a flame retardant when compared to samples with MMT‐30B. Although the MMT‐30B nanocomposites could not be classified according to the UL‐94 criteria, no dripped flaming particles were observed, due to the a char barrier formation on the polymer surface. The CNT nanocomposites were classified according to the UL‐94 criteria as V‐2. The CNT's selective localization on the SEBS phase decreases its heat‐release rate, but no interconnected network structure was formed in the matrix to suppress the dripping flaming particles.

中文翻译：

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碳纳米管和纳米粘土对非晶聚酰胺/ SEBS共混物的热性能和可燃性的比较性能

将多壁碳纳米管（CNT）或蒙脱土（MMT-30B）添加到聚（六亚甲基间苯二甲酰胺-对-对苯二胺）（一种无定形聚酰胺-aPA）中，并用马来酸酐（SEBS）石墨化苯乙烯-乙烯/丁烯-苯乙烯，以不同的浓度，以研究其形态，热性能和可燃性。通过透射电子显微镜观察到相掺合物中不同的纳米颗粒定位。CNT纳米颗粒位于SEBS相中，而MMT-30B纳米颗粒位于aPA相中。两种纳米颗粒的添加均未观察到转变温度和热稳定性的显着变化。但是，观察到粘土纳米复合材料的储能模量略有增加，而碳纳米管纳米复合物的储能模量略有降低，由于它们的相位不同。关于可燃性，与具有MMT-30B的样品相比，CNT纳米复合材料具有更好的阻燃性能。尽管无法根据UL-94标准对MMT-30B纳米复合材料进行分类，但由于在聚合物表面形成了炭障，因此未观察到滴落的燃烧颗粒。CNT纳米复合材料根据UL-94标准分类为V-2。碳纳米管在SEBS相上的选择性定位降低了其放热率，但是在基质中没有形成相互连接的网络结构来抑制滴落的燃烧颗粒。尽管无法根据UL-94标准对MMT-30B纳米复合材料进行分类，但由于在聚合物表面形成了炭障，因此未观察到滴落的燃烧颗粒。CNT纳米复合材料根据UL-94标准分类为V-2。碳纳米管在SEBS相上的选择性定位降低了其放热率，但是在基质中没有形成互连的网络结构来抑制滴落的燃烧颗粒。尽管无法根据UL-94标准对MMT-30B纳米复合材料进行分类，但由于在聚合物表面形成了炭障，因此未观察到滴落的燃烧颗粒。CNT纳米复合材料根据UL-94标准分类为V-2。碳纳米管在SEBS相上的选择性定位降低了其放热率，但是在基质中没有形成互连的网络结构来抑制滴落的燃烧颗粒。