کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1580993 | 1514849 | 2009 | 6 صفحه PDF | دانلود رایگان |
In this work, a 2k factorial design was used to determine the interaction between sonication time, ultrasound amplitude, and carboxylic-functionalized single-walled carbon nanotubes (c-SWNT) content and their effect on the tensile, dilatometric, and dynamic-mechanical properties of casted epoxy nanocomposites reinforced with c-SWNTs. The nanocomposites were prepared with the help of a solvent (tetrahydrofuran) to reduce resin viscosity. Tensile strength increased with sonication for higher amplitudes and shorter times (20 min). The addition of 0.25 wt% c-SWNT enhanced the mechanical properties, increasing the Young's modulus up to 30% in comparison with neat epoxy prepared under the same conditions. Dilatometry tests showed that shrinkage takes place at the epoxy glass transition, while dynamic-mechanical analyses confirmed the tensile results and suggested that the presence of nanotubes yielded a more homogeneous epoxy resin network, probably due to the minimization of residual solvent.
Journal: Materials Science and Engineering: A - Volume 509, Issues 1–2, 25 May 2009, Pages 57–62