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首页> 外文期刊>Journal of Applied Polymer Science >Morphology, thermal stability, and dynamic mechanical properties of atactic polypropylene/carbon nanotube composites
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Morphology, thermal stability, and dynamic mechanical properties of atactic polypropylene/carbon nanotube composites

机译：无规聚丙烯/碳纳米管复合材料的形貌，热稳定性和动态力学性能

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摘要

Nanocomposites based on atactic polypropylene (aPP) and multiwall carbon nanotubes were prepared by melt blending at 80 degrees C with a Barabender mixer. The morphology, thermal stability, and dynamic mechanical properties of the obtained composites were studied subsequently. SEM observations indicate that the nanotubes are well dispersed in the aPP matrix. Each nanotube is covered by a layer of aPP molecules. Thermal stability of the aPP in nitrogen is found to be enhanced significantly by the addition of nanotubes. Peak temperature of the DTG curve for the nanocomposite with 5 wt % nanotube loading shows about 70 degrees C higher than that of pure aPP. Dynamic mechanical properties of aPP are also influenced by nanotubes, as shown by the increase in the storage modulus as well as significantly broadened loss tan delta peak. These effects of nanotubes on the thermal stability and mechanical properties of aPP are explained by the adsorption effect of the aPP molecules on the nanotube surfaces in this study. (c) 2005 Wiley Periodicals, Inc.
机译：基于无规聚丙烯（aPP）和多壁碳纳米管的纳米复合材料是通过使用Barabender混合器在80摄氏度下熔融共混制备的。随后研究了所得复合材料的形貌，热稳定性和动态力学性能。 SEM观察表明，纳米管很好地分散在aPP基质中。每个纳米管被一层aPP分子覆盖。发现通过添加纳米管，aPP在氮气中的热稳定性显着增强。具有5重量％的纳米管负载的纳米复合材料的DTG曲线的峰值温度显示出比纯aPP的峰值温度高约70℃。 aPP的动态力学性能也受纳米管的影响，如储能模量的增加以及损耗正切增量的明显增加所表明。在这项研究中，aPP分子在纳米管表面上的吸附效应解释了纳米管对aPP热稳定性和机械性能的这些影响。 （c）2005年Wiley Periodicals，Inc.

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