Multiwalled carbon nanotube (MWCNT) was dispersed in sodium dodecyl benzene sulphonate (SDBS) by
sonication. The dispersed MWCNT (0.05–0.3 gm) was incorporated in carboxylated acrylonitrile butadiene
rubber (XNBR) latex. Mechanical, electrical and thermal properties of these composites were studied.
Mechanical properties of the composites increased up to an optimum concentration and then decreased.
Dielectric properties of the composites were studied in the S band (frequency range 2–4 GHz) by Cavity
Perturbation method. Direct current (DC) electrical conductivity shows a percolation behaviour and conductivity
increased by about 10 orders of magnitude. Thermal studies were conducted using Differential
Scanning Calorimetry (DSC) and Thermo Gravimetric Analysis (TGA). As expected with the very small
concentration of multiwalled carbon nanotube, glass transition temperature (Tg) and thermal stability
of the composite showed a marginal increase. Composites were characterized by Fourier transform infrared
spectroscopy (FTIR), X-ray diffraction (XRD) and Scanning electron microscope (SEM) analysis.