Abstract The viscoelastic behavior of multiwall carbon nanotube (MWCNT) reinforced polyamide 66 (PA 66) was evaluated to investigate the effect of CNT content and loading frequency on dynamic moduli (i.e. storage modulus E′ and loss modulus E″) and damping factor tan δ . PA 66/CNT disk samples with five different CNT contents ranging from 3 wt % to 15 wt % were manufactured by injection molding. Testing was performed over the frequency range of 0.1–100 Hz at room temperature. Dynamic mechanical analysis results show that the mechanical properties are highly functions of tested frequency and the improvement on loss and storage modulus of nanocomposites with the addition of CNT is highly dependent on tested frequencies. The variability in loss modulus is significantly higher than the variability in the storage modulus indicating the correlation of loss modulus with uncertainties present in nanocomposite microstructure while storage modulus is essentially independent of microstructure for a given reinforcement content.

中文翻译：

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微观结构不确定度和测试频率对注射成型多壁碳纳米管增强聚酰胺 66 纳米复合材料存储和损耗模量的影响

摘要 评估了多壁碳纳米管 (MWCNT) 增强的聚酰胺 66 (PA 66) 的粘弹性行为，以研究 CNT 含量和加载频率对动态模量（即储能模量 E' 和损耗模量 E”）和阻尼因子 tan δ 的影响. PA 66/CNT 圆盘样品具有五种不同的 CNT 含量，范围从 3 wt% 到 15 wt%，通过注塑成型制造。测试是在室温下在 0.1–100 Hz 的频率范围内进行的。动态力学分析结果表明，力学性能是测试频率的高度函数，并且添加CNT对纳米复合材料的损耗和储能模量的改善高度依赖于测试频率。