自熄和非滴漏阻燃聚酰胺6纳米复合材料:机械,热和燃烧行为

Hao Wu, R. Ortiz, R. A. Correa, M. Krifa, J. Koo
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引用次数: 11

摘要

在热塑性聚合物中掺入阻燃剂和纳米粘土填料可以有效地抑制材料的可燃性和熔体滴入行为。然而,它在很大程度上影响其他性能,如韧性和延展性。为了恢复阻燃聚酰胺6失去的韧性和延展性,加入不同载荷的马来酸酐改性SEBS弹性体,采用双螺杆挤出工艺对其进行加工。TEM图像显示脱落的纳米粘土薄片,显示粘土薄片在聚合物基质中分散良好。通过平衡阻燃剂、纳米粘土和弹性体的比例,获得了断裂伸长率高达76%的配方。将常规膨胀FR与纳米粘土相结合,获得了UL-94 V-0额定值和高达32.2的LOI值。综上所述,获得了有效的自熄和不滴漏的聚酰胺6纳米复合材料配方,并显著提高了韧性和延展性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Self-Extinguishing and Non-Drip Flame Retardant Polyamide 6 Nanocomposite: Mechanical, Thermal, and Combustion Behavior
Abstract Incorporation of flame-retardant (FR) additives and nanoclay fillers into thermoplastic polymers effectively suppresses materials flammability and melt dripping behavior. However, it largely affects other properties, such as toughness and ductility. In order to recover the lost toughness and ductility of flame retardant polyamide 6, various loadings of maleic anhydride modified SEBS elastomer were added and processed by twin screw extrusion. TEM images showed exfoliated nanoclay platelets and reveals that the clay platelets well dispersed in the polymer matrix. By balancing the ratio of flame retardants, nanoclay and elastomers, formulation with elongation at break as high as 76% was achieved. Combining conventional intumescent FR and nanoclay, UL-94 V-0 rating and the LOI value as high as 32.2 were achieved. In conclusion, effective self-extinguishing and non-drip polyamide 6 nanocomposite formulations with significant improvement in toughness and ductility were achieved.
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