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首页> 外文期刊>Journal of Applied Polymer Science >Thermal degradation kinetics of polyimide nanocomposites from different carbon nanofillers: Applicability of different theoretical models
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Thermal degradation kinetics of polyimide nanocomposites from different carbon nanofillers: Applicability of different theoretical models

机译：不同碳纳米氧化物聚酰亚胺纳米复合材料的热降解动力学：不同理论模型的适用性

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摘要

In this study, the nanocomposites of polyimide (PI) with the nanofillers multiwalled carbon nanotube (MWCNT) and carbon nanofiber (CNF) were prepared by in situ polymerization technique. The thermal stability of the nanocomposites were investigated and discussed with respect to nanofillers type, concentration, and their functionality within the PI matrix. It is observed that there are 16 and 18 degrees C increment in thermal degradation temperature with the addition of 3 wt % MWCNT and CNF within the PI matrix, respectively. The thermal degradation kinetics of the nanocomposites were studied by Kissinger-Akahira-Sunose method, Flynn-Wall-Ozawa method, and Kim-Park method. The results show that these models are well fitted with the experimental data. It is found that the calculated activation energy increases with the increase in nanofillers loading and PI/CNF nanocomposites exhibit higher activation energy compared to PI/MWCNT composites at their similar loading. Moreover, the effect of nanofillers type and loading on the glass transition temperature of nanocomposites were also investigated in details. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45862.
机译：在该研究中，通过原位聚合技术制备与纳米填料多壁碳纳米管（MWCNT）和碳纳米纤维（CNF）的聚酰亚胺（PI）的纳米复合材料。研究了纳米复合材料的热稳定性，并相对于PI基质内的纳米填充物型，浓度及其官能度讨论。观察到，在热劣化温度下，分别在PI矩阵内的3wt％MWCNT和CNF中存在16和18摄氏度。通过Kissinger-akahira-Sunose方法，Flynn-Wall-ozawa方法和Kim-Park方法研究了纳米复合材料的热降解动力学。结果表明，这些模型与实验数据很好。结果发现，与纳米填充器的增加，计算的激活能量随着它们类似的载荷而与PI / MWCNT复合材料相比，PI / CNF纳米复合材料表现出更高的活化能量。此外，还研究了纳米填料型和加载对纳米复合材料的玻璃化转变温度的影响。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45862。

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