Journal
JOURNAL OF POLYMER RESEARCH
Volume 19, Issue 2, Pages -Publisher
SPRINGER
DOI: 10.1007/s10965-011-9795-z
Keywords
Nanocomposites; Polystyrene; Dielectric properties; Dielectric constant; Dielectric loss; Ac conductivity
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Multi-wall carbon nanotubes (MWNTs)/polystyrene (PS) nanocomposites containing different concentrations of MWNTs were prepared by the solution evaporation method. Dispersion of MWNTs in PS was achieved by using ultrasonic energy. The structure of nanocomposites was investigated using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The dielectric constant (epsilon'), dielectric loss (epsilon ''), and ac conductivity (sigma(ac)) were measured from room temperature to 100 degrees C over the frequency range 10(3) Hz-1.2MHz. The results show that the dielectric properties depend on both frequency and temperature and they are enhanced by increasing the MWNTs content.
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