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Towards the development of poly (phenylene sulphide) based nanocomposites with enhanced mechanical, electrical and tribological properties

机译：致力于开发具有增强的机械，电学和摩擦学性能的基于聚苯硫醚的纳米复合材料

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Novel poly(phenylene sulphide) (PPS) nanocomposites reinforced with an aminated derivative (PPS-NH2) covalently attached to acid-treated single-walled carbon nanotubes (SWCNTs) were prepared via simple melt-blending technique. Their morphology, viscoelastic behaviour, electrical conductivity, mechanical and tribological properties were investigated. Scanning electron microscopy revealed that the grafting process was effective in uniformly dispersing the SWCNTs within the matrix. The storage and loss moduli as a function of frequency increased with the SWCNT content, tending to a plateau in the low-frequency regime. The electrical conductivity of the nanocomposites was considerably enhanced in the range 0.1?0.5 wt% SWCNTs; electrical and rheological percolation thresholds occurred at similar nanotube concentrations. Mechanical tests demonstrated that with only 1.0 wt% SWCNTs the Young's modulus and tensile strength of the matrix improved by 51 and 37%, respectively, without decrement in toughness, ascribed to a very efficient load transfer. A moderate decrease in the friction coefficient and a 75% reduction in wear rate were found for the abovementioned nanotube loading, indicating that PPS-NH2-g-SWCNTs are good tribological additives for thermoplastic polymers. Based on the promising results obtained in this work, it is expected that these nanofillers will be used to develop high-performance thermoplastic/CNT nanocomposites for structural applications.
机译：通过简单的熔融共混技术，制备了一种共价连接到酸处理过的单壁碳纳米管（SWCNTs）上的胺化衍生物（PPS-NH2）增强的新型聚苯硫醚（PPS）纳米复合材料。研究了它们的形态，粘弹性行为，电导率，机械和摩擦学性能。扫描电子显微镜显示，接枝过程有效地将SWCNT均匀地分散在基质中。存储和损耗模量随频率的变化随SWCNT含量的增加而增加，在低频范围内趋于平稳。纳米复合材料的电导率在0.1-0.5 wt％的SWCNTs范围内得到了显着提高。电和流变渗透阈值发生在相似的纳米管浓度下。机械测试表明，仅使用1.0 wt％的SWCNT，基质的杨氏模量和拉伸强度分别提高了51％和37％，而韧性没有降低，这归因于非常有效的载荷传递。对于上述纳米管负载，发现摩擦系数的适度降低和磨损率的75％降低，表明PPS-NH2-g-SWCNT是热塑性聚合物的良好摩擦添加剂。基于这项工作获得的令人鼓舞的结果，预计这些纳米填料将用于开发用于结构应用的高性能热塑性/ CNT纳米复合材料。

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