Viscoelastic behavior of poly(ether imide) incorporated with multiwalled carbon nanotubes
Viscoelastic behavior of poly(ether imide) incorporated with multiwalled carbon nanotubes
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多壁碳纳米管聚醚酰亚胺的粘弹性行为
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
D. Kalyon
中科院分区：
文献类型：
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作者：
Kimberly B. Shepard;H. Gevgilili;M. Ocampo;Jia Li;F. Fisher;D. Kalyon
利用多壁碳纳米管（MWCNTs）等纳米包合物对聚醚酰亚胺（PEI）等工程塑料的机械、电学和热学性能进行改性具有重要的应用前景。然而，这种潜力只能通过对纳米复合材料在其制备过程中所暴露的流变行为和热机械历史以及由此产生的有效性能的透彻理解来充分实现。在这项研究中，PEI和多壁碳纳米管的纳米复合材料使用溶液加工方法在不同的分散条件下进行预分散，并且纳米复合材料的粘弹性材料功能被表征为在1-5%重量范围内的碳纳米管浓度（体积分数，/ ¼ 0.006-0.03）和温度的函数。PEI纳米悬浮液的储能模量和复数粘度值的大小分别增加了多达3500%和800%，在/1/4 0.03下，沿着在其它粘弹性材料功能中观察到或预测到类似数量级的增加。这样的增加反映了纳米管掺入和网络形成如何可以在加工相关温度和变形速率下显著改变PEI/CNT纳米悬浮液的流动和变形行为。V C 2012 Wiley Peri- odicals，Inc.聚合物科学杂志B部分：聚合物物理50：1504-1514，2012
There is significant potential in improving the mechanical, electrical, and thermal properties of engineering plastics, including poly(ether imide) (PEI), with various nanoin- clusions such as multiwalled carbon nanotubes (MWCNTs). However, this potential can only be fully realized through a thor- ough understanding of the rheological behavior and the ther- momechanical histories that the nanocomposites are exposed to during their preparation and the resulting effective properties. In this study, nanocomposites of PEI and MWCNTs were pre- pared using a solution processing method under different dis- persion conditions, and the viscoelastic material functions of the nanocomposites were characterized as functions of concentration of CNTs in the 1-5% by weight range (volume fraction, / ¼ 0.006-0.03) and temperature. The storage modulus and magnitude of complex viscosity values of the PEI nanosus- pensions increased by as much as 3500% and 800%, respec- tively, at / ¼ 0.03, along with similar orders of magnitude increases observed or predicted in other viscoelastic material functions. Such increases reflect how nanotube incorporation and network formation can drastically alter the flow and defor- mation behavior of the PEI/CNT nanosuspensions at processing- relevant temperatures and deformation rates. V C 2012 Wiley Peri- odicals, Inc. J Polym Sci Part B: Polym Phys 50: 1504-1514, 2012