Pseudoreinforcement effect of multiwalled carbon nanotubes in epoxy matrix composites

被引：0
|
作者：
Zhuang, G.S. [1 ,2 ]
Sui, G.X. [1 ]
Sun, Z.S. [1 ]
Yang, R. [1 ]
机构：
[1] Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
[2] College of Materials Science and Engineering, Shandong University, Jinan 250061, China
来源：
Journal of Applied Polymer Science | 2006年 / 102卷 / 04期
关键词：
The carbon nanotube possesses outstanding physical properties. Theoretically; adding carbon nanotubes into a polymer matrix can remarkably improve the mechanical properties of the polymer matrix. In the present work; a series of composites was prepared by incorporating multiwalled carbon nanotubes (MWNTs) into an epoxy resin. The influences of MWNT content and curing temperature on the flexural properties of the epoxy resin were investigated. The results showed that a very low MWNT content should be used to ensure homogeneous dispersion of MWNTs in the epoxy matrix. A higher MWNT content may lead to deteriorated mechanical properties of the composites because of the aggregation of MWNTs. A decline in the flexural properties of the neat epoxy resin with increasing curing temperature was found. However; under the same curing conditions; improvement in flexural properties was observed for the composite with the low MWNT content and a mild curing temperature. The improvement was far beyond the predictions of the traditional short-fiber composite theory. In fact; this improvement should be attributed to the retarding effect of MWNTs on the curing reaction of epoxy matrix. Therefore; the improvement in the flexural properties was only a pseudoreinforcement effect; not a nano-reinforcement effect of the MWNTs on the epoxy resin. Perhaps; it is better for MWNTs to be used as functional fillers; such as electrical or thermal conductive fillers; than as reinforcements. © 2006 Wiley Periodicals; Inc;
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页码：3664 / 3672
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