Marset David, Fages Eduardo, Gonga Eloi, Ivorra-Martinez Juan, Sánchez-Nacher Lourdes, Quiles-Carrillo Luis
Textile Industry Research Association (AITEX), Plaza Emilio Sala 1, 03801 Alcoy, Spain.
Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain.
Polymers (Basel). 2022 Apr 30;14(9):1843. doi: 10.3390/polym14091843.
Bio-based polyamide 1010 was melt-compounded with different percentages (2.5 to 10.0 wt.%) of expandable graphite (EGr) as an environmentally friendly solution to improve the flame retardancy properties. The mechanical, morphological, thermal and fire retardancy properties (among others) are analysed. The novelty of the article lies in the use of fully removable polyamide. The effect of the incorporation of EGr in the properties of this polymer was analysed and characterised. The incorporation of EGr into the PA1010 matrix led to very promising results. Mechanically, the EGr provided increased stiffness and a tensile strength up to 7.5 wt.%, verifying good mechanical performance. The DMTA results also show how the incorporation of EGr in the PA1010 matrix clearly increases the stiffness of the composites over the entire temperature range analysed. In terms of physical properties, water absorption of PA1010 was reduced particularly in the 10% EGr, which reduces the water absorption of PA1010 by 20%. In terms of flame retardant properties, with the incorporation of EGr, a significant reduction in the heat release rate (HRR) values as the concentration of the additive increases and a reduction in the maximum peak heat release rate (pHRR) can be observed for all compounds. In particular, it goes from 934 kW/m for neat polyamide to a value of 374 kW/m with 10% EGr. Finally, an improvement in the UL-94 rating of the 7.5 and 10% EGr composites was also observed, going from V-2 in the PA to V-1 in these composites.
生物基聚酰胺1010与不同百分比（2.5至10.0重量%）的可膨胀石墨（EGr）进行熔融共混，作为一种环保解决方案来改善其阻燃性能。对其机械、形态、热和阻燃性能等进行了分析。本文的新颖之处在于使用了完全可移除的聚酰胺。分析并表征了EGr的加入对该聚合物性能的影响。EGr加入到PA1010基体中产生了非常有前景的结果。在机械性能方面，EGr在添加量高达7.5重量%时提高了刚度和拉伸强度，验证了良好的机械性能。动态热机械分析（DMTA）结果还表明，EGr加入到PA1010基体中在整个分析温度范围内显著提高了复合材料的刚度。在物理性能方面，PA1010的吸水性尤其在加入10%EGr时有所降低，PA1010的吸水性降低了20%。在阻燃性能方面，随着EGr的加入，可以观察到所有化合物的热释放速率（HRR）值随着添加剂浓度的增加而显著降低，最大峰值热释放速率（pHRR）也降低。特别是，纯聚酰胺的热释放速率为934kW/m²，加入10%EGr后降至374kW/m²。最后，还观察到7.5%和10%EGr复合材料的UL-94等级有所提高，从PA的V-2级提高到这些复合材料的V-1级。
