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Abstract
AbstractRheological and mechanical characterizations were carried out for carbon nanotubes/poly(ethylene oxide) (PEO) nanocomposites to examine the effect of surface modification of carbon nanotubes on the CNT dispersion state. Residual stress in the gap-wise direction of the nanocomposites was measured using the layer removal method. It was found that the different chemical treatments for CNT surface make a big difference in the dispersion state of the CNTs and that the nanocomposites filled with better dispersed CNTs possess higher storage and elastic moduli. From the rheological observations, rheological percolation structure was found to exist in the nanocomposites, which was confirmed by morphological experiments. The residual stress data showed that stronger residual stress is developed in the PEO nanocomposites by non-isothermal cooling than in pure PEO.
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