Physico-mechanical and electrical properties of conductive carbon black reinforced chlorosulfonated polyethylene vulcanizates

Abstract

Abstract. The present work deals with the effect of conductive carbon black (Ensaco 350G) on the physico-mechanical and electrical properties of chlorosulfonated polyethylene (CSM) rubber vulcanizates. The physico-mechanical properties like tensile strength, tear strength, elongation at break, compression set, hardness and abrasion resistance have been studied before and after heat ageing. Up to 30 parts per hundred rubber (phr) filler loading both tensile and tear strength increases beyond which it shows a decreasing trend whereas modulus gradually increases with the filler loading. Incorporation of carbon black increases the hysteresis loss of filled vulcanizates compared to gum vulcanizates. Unlike gum vulcanizate, in filled vulcanizates the rate of relaxation shows increasing trend. The bound rubber content is found to increase with increase in filler loading. Dielectric relaxation spectra were used to study the relaxation behavior as a function of frequency (100 to 10 6 Hz) at room temperature. Variation in real and imaginary parts of electric modulus has been explained on the basis of interfacial polarization of fillers in the polymer medium. The percolation limit of the conductive black as studied by ac conductivity measurements has also been reported.

Electrically conductive kraft lignin-based carbon filler for polymers

“…However, concurrently tensile strength and, in particular, strain at failure, decrease significantly, as is often observed for polymers reinforced with micron-scale spherical particles [43]. Beyond improvement in modulus of elasticity, the particular benefit of reinforcing organic polymers with carbon microparticles is imparting electrical conductivity [21,[44][45][46][47][48]. With the set-up chosen for the present study, electrical conductivity was obtained for polycaprolactone-carbon composite sheets beyond a particle loading of 0.15 (Fig.…”

Electrical conductivity studies on carbon black loaded ethylene butylacrylate polymer composites

“…5 and 6 show the frequency dependence of real and imaginary parts of the complex modulus, at room temperature, for samples with volume fractions below and above the percolation threshold, Φ c , respectively. From these figures, it can be observed that irrespective of the amount of filler in the composite, the value of M′ is nearly zero at low frequencies indicating that the electrode polarization gives a negligibly low contribution [36,37]. Havriliak-Negami model fits correctly the data [38,39].…”

Mechanical properties of ceramic-polymer nanocomposites

“…Most of these modifications are made by the addition of inorganic fillers to the polymer. These fillers, present in varying degrees, also affect the basic mechanical properties of the polymer [8][9][10][11][12]. In the present work we have synthesized a new class of ferroelectric ceramic material barium sodium niobate [13][14][15] and prepared composites out of it by mixing it with polystyrene.…”