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Steel fibre-silicone rubber composites were prepared by two-roll mill method. Various weight fractions of fibres ranging from 20 phr (parts per hundred parts of rubber) to 90 phr, with a diameter of 7-8 mm and length of several metres were used and its influence on the surface resistance, physical properties, short-term and dynamic stress-strain properties of the composites were investigated. Addition of steel fibres renders a sharp decrease in resistance from MO to *3-0.1 kO with the concentration from 20 phr to 90 phr, respectively. Addition of 20 phr of steel fibres yields composite with a resistance of 5-10 kO, other properties being negligibly altered.

Electrically conductive composites comprised of silicone rubber and titanium diboride (TiB2) were synthesized by conventional mixing methods. Fine particles of TiB2 (in micron size) and 10 parts per hundred parts of rubber (phr) proportion of carbon black (XC-72) were used to make the composites with HTV silicone rubber. The composites were cured at appropriate temperature and pressure and the effect on the electrical properties was studied. The resistance of the silicone rubber is ~ 1015Ω which decreases to 1 – 2 kΩ in case of composites with negligible effect of heat ageing. The hardness increases by ~ 35% simultaneous to the decrease of ~ 47% in the tensile strength. Morphological characterization indicates the homogeneous dispersion of the fillers in the composite.

In this paper, electrically conductive composites comprised of silicone rubber and titanium diboride (TiB2) were synthesized by conventional mixing methods. Fine particles of TiB2 (in micron size) and 10 parts per hundred parts of rubber (phr) proportion of carbon black (XC-72) were used to make the composites with HTV silicone rubber. The composites were cured at appropriate temperature and pressure and the effect on the electrical properties was studied. The resistance of the silicone rubber is ~ 1015Ω which decreases to 1–2 kΩ in case of composites with negligible effect of heat ageing. The hardness increases by ~ 35% simultaneous to the decrease of ~ 47% in the tensile strength. Morphological characterization indicates the homogeneous dispersion of the fillers in the composite.