Abstract
Carbon nanotubes (CNTs) are being used as filler in epoxy matrix to produce isotropically conductive adhesives (ICAs). Different loadings of multiwalled carbon nanotubes were used to produce composites of different concentrations. These composites have been studied for their thermal behaviour, conductivity and impact properties. Percolation threshold is very low and conductivity value of 10 ∼ 2Scm_1 was obtained at a filler concentration of only 0.3%. Higher percentage of the epoxy shear strength is retained. Differential scanning calorimetry results do not show any major influence on typical curing peaks of epoxy. Scanning electron microscopy confirmed that CNTs are easily dispersed in the epoxy matrix and there is a strong phase interaction. These composites with very low filler loadings showed a great prospect of being used as ICAs.
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