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http://dx.doi.org/10.3795/KSME-A.2013.37.5.657

Measurement of Mechanical Property and Thermal Expansion Coefficient of Carbon-Nanotube-Reinforced Epoxy Composites  

Ku, Min Ye (Div. of Mechanical Design Engineering, Chonbuk Nat'l Univ.)
Kim, Jung Hyun (Div. of Mechanical Design Engineering, Chonbuk Nat'l Univ.)
Kang, Hee Yong (Div. of Mechanical Design Engineering, Chonbuk Nat'l Univ.)
Lee, Gyo Woo (Div. of Mechanical Design Engineering, Chonbuk Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.5, 2013 , pp. 657-664 More about this Journal
Abstract
By using shear mixing and ultrasonication, we fabricated specimens of well-dispersed multi-walled carbon nanotube composites. To confirm the proper dispersion of the filler, we used scanning electron microscopy images for quantitative evaluation and a tensile test for qualitative assessment. Furthermore, the coefficients of thermal expansion of several specimens having different filler contents were calculated from the measured thermal strains and temperatures of the specimens. Based on the microscopy images of the well-dispersed fillers and the small deviations in the measurements of the tensile strength and stiffness, we confirmed the proper dispersion of nanotubes in the epoxy. As the filler contents were increased, the values of tensile strength increased from 58.33 to 68.81 MPa, and those of stiffness increased from 2.93 to 3.27 GPa. At the same time, the coefficients of thermal expansion decreased. This implies better thermal stability of the specimen.
Keywords
Carbon Nanotubes; Epoxy Composite; Shear Mixing; Mechanical Property; Coefficient of Thermal Expansion;
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