Dispersion of functionalized carbon nanotubes in polystyrene
Dispersion of functionalized carbon nanotubes in polystyrene
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DOI：
10.1021/ma020890y
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发表时间：
2002-11-05
期刊：
影响因子：
5.5
通讯作者：
Krishnamoorti, R
中科院分区：
文献类型：
--
作者：
Mitchell, CA;Bahr, JL;Krishnamoorti, R
通过有机重氮化合物的原位生成和反应制备的具有功能化单壁碳纳米管（SWNT）的聚苯乙烯纳米复合材料，使用熔融态线性动态粘弹性测量进行表征。这些性能与在相似负载量下使用非功能化单壁碳纳米管制备的聚苯乙烯复合材料的性能进行了对比。功能化纳米复合材料在 1 vol% SWNT 浓度下表现出渗滤 SWNT 网络结构，而未功能化 SWNT 基复合材料在两倍 SWNT 负载量下表现出与未填充聚合物相当的粘弹性行为。功能化的基于 SWNT 的复合材料形成 SWNT 网络结构是因为 SWNT 与聚合物基体之间的相容性得到改善，从而导致 SWNT 更好的分散。
Polystyrene nanocomposites with functionalized single-walled carbon nanotubes (SWNTs), prepared by the in-situ generation and reaction of organic diazonium compounds, were characterized using melt-state linear dynamic viscoelastic measurements. These were contrasted to the properties of polystyrene composites prepared with unfunctionalized SWNTs at similar loadings. The functionalized nanocomposites demonstrated a percolated SWNT network structure at concentrations of 1 vol % SWNT, while the unfunctionalized SWNT-based composites at twice the loading of SWNT exhibited viscoelastic behavior comparable to that of the unfilled polymer. This formation of the SWNT network structure for the functionalized SWNT-based composites is because of the improved compatibility between the SWNTs and the polymer matrix and the resulting better dispersion of the SWNT.