Improving thermal durability and mechanical properties of poly(ether ether ketone) with single-walled carbon nanotubes
Improving thermal durability and mechanical properties of poly(ether ether ketone) with single-walled carbon nanotubes
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DOI：
10.1016/j.polymer.2019.05.028
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发表时间：
2019-08-02
期刊：
影响因子：
4.6
通讯作者：
Hata, Kenji
中科院分区：
文献类型：
--
作者：
Ata, Seisuke;Hayashi, Yoshihiro;Hata, Kenji
在本研究中，将碳纳米管（CNTs）加入到聚醚醚酮（PEEK）中，不仅提高了PEEK的力学性能，而且由于CNTs的抗氧化作用，还提高了PEEK的耐热性。PEEK-CNT复合材料在450 ℃下没有显示出大的重量损失。用密度泛函理论计算了碳纳米管对PEEK在450 ℃分解产物1，4-二苯氧基苯自由基和4-苯氧基苯酚自由基的稳定化能（AG），分别为-80.3和150.2 kJ mol（-1）。证实了1，4-二苯氧基苯自由基可以被CNT捕获在450 ℃的高温环境中。碳纳米管的添加几乎没有改变成形性，但拉伸强度和弯曲强度等机械性能得到了极大的提高。PEEK-CNT复合材料有望具有更好的耐热性和机械性能，以及更高的可靠性，因此未来可用于航空航天和汽车等各个领域。
In this study, adding carbon nanotubes (CNTs) to poly (ether ether ketone) (PEEK) not only improved the mechanical properties, but also improved the thermal resistivity of PEEK owing to the CNTs' function as an antioxidant. The PEEK-CNT composite did not show large weight loss at 450 degrees C. The stabilization energies (AG) of CNTs for 1,4-diphenoxybenzene radical and 4-phenoxyphenol radical, which are decomposition products of PEEK at 450 degrees C, were calculated by density functional theory, and they were estimated to be -80.3 and 150.2 kJ mol(-1), respectively. It was confirmed that 1,4-diphenoxybenzene radical could be trapped in a high-temperature environment of 450 degrees C by the CNTs. The addition of CNTs yielded almost no change in formability, but the mechanical properties such as tensile strength and bending strength were greatly improved. The PEEK-CNT composite is expected to have improved heat resistivity and mechanical properties, as well as higher reliability, so that it can be used in the future in various fields such as aerospace and automotive.