Physico-mechanical and Electrical Properties of NBR Structure Foams | ||||
| Egyptian Journal of Solids | ||||
| Article 12, Volume 25, Issue 2, 2002, Page 295-306 PDF (277.15 K) | ||||
| DOI: 10.21608/ejs.2002.150485 | ||||
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| Abstract | ||||
| Nitrile butadiene rubber, NBR, structure foam of different apparent densities was obtained by using different concentrations of foaming agent, azodicarbonamide, ADC/K. The swelling factor in kerosene and benzene as a function of time was measured to elucidate the structure of these foams. This study was assisted by the current-voltage characteristics which were measured under the effect of different ratios of compressions: 0%, 10%, 30%, 40%, 50% and 60%. Under Joule heating limit, deviation of conductivity from Ohmic type of conduction, detected before, was observed as a result of compression. Shape factor, free current carrier mobility, and the equilibrium concentration of charge carrier in the conduction band were produced as functions of compressive strain. The conduction mechanism was found to follow the conventional band approach. | ||||
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