Abstract
The electrical resistivity of short carbon fibre filled thermoplastic elastomers based on natural rubber-high density polyethylene (NR-HDPE) blend and styrene-isoprene-styrene (S-I-S) block copolymer has been studied by varying the concentration of fibre from the 0 to 40 phr level. A sharp drop in resistivity is observed in both cases after a critical concentration of fibre is reached, with the S-I-S system showing lower values of critical concentration. At higher concentrations, experimental values of the electrical conductivity agreed reasonably well with the calculated values from a theory based on the probability of formation of a conductive network. The effect of temperature on the resistivity of the composites has also been investigated in a temperature range of 27–120 °C and 27–90 °C for the NR-HDPE system and S-I-S system, respectively. The type of carrier in both the composites is found to be n-type, i.e. electrons, and the activation energy of hopping of the electrons for both the systems has been calculated. A Hall effect study has also been carried out to determine the carrier concentration and drift mobility of both the composites.
Similar content being viewed by others
References
D. Roy, A. K. Bhowmick andS. K. De,Polym. Engg. Sci. 32 (1992) 971.
Idem. J. Appl. Polym. Sci. 49 (1993) 263.
D. Roy, A. K. Bhattacharya andB. R. Gupta,J. Elast. Plast. 25 (1993) 46.
J. V. Foy andJ. Lindt,Polym. Composites 8 (1987) 419.
A. I. Medalia,Rubber Chem. Technol. 59 (1986) 432.
F. J. Balta Calleja, R. K. Bayer andT. A. Ezquerra,J. Mater. Sci. 23 (1988) 1411.
P. B. Jana, S. Chaudhuri, A. K. Pal andS. K. De,Polym. Engg. Sci. 32 (1992) 448.
P. K. Pramanik, D. Khastgir, S. K. De andT. N. Saha,J. Mater. Sci. 25 (1990) 3848.
J. Martinsson andJ. L. White,Polym. Composite 7 (1986) 302.
J. D. Ajayi andC. Hepburn,Plast. Rubber Proc. Appl. 1 (1981) 317.
A. R. Blythe, ‘Electrical Properties of Polymers’, Cambridge University Press (1980).
B. G. Sheetman, ‘Solid State Electronic Devices’, Prentice Hall of India Pvt. Ltd. (1983).
L. J. Vander Pauw,Philips Research Reports,13 (1958) 19.
P. B. Jana, S. K. De, S. Chaudhuri andA. K. Pal Rubber Chem. Technol. 7 (1992) 65.
J. B. Donnet andR. C. Bansal, Carbon Fibers, Marcel Dekker Inc., New York (1989).
T. Slupkowski, Int.Polym. Sci. Technol. 13 (1986) T/80.
D. N. Aneli andG. M. Topchishvili,Int. Polym. Sci. Technol. 13 (1986) T/91.
E. M. Abdel-Bary, M. Amin andH. H. Hassan,J. Polym. Sci., Polym. Chem. Ed 17 (1979) 2163.
S. K. Bhattacharya, S. Basu andS. K. De,J. Appl. Polym. Sci. 25 (1980) 111.
J. W. Orton andM. J. Powell,Rep. Prog. Phys. 43 (1980) 1263.
N. F. Mott Phil. Mag,19 (1969) 835.
H. Overhof,Adv. Solid State Phys. 16 (1976) 239.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Roy, D., Jana, P.B., De, S.K. et al. Studies on the electrical conductivity and galvanomagnetic characteristics of short carbon fibre filled thermoplastic elastomers. J Mater Sci 31, 5313–5319 (1996). https://doi.org/10.1007/BF01159298
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01159298