Abstract

W. B. Gurnule, H. D. Junejaa and L. J. Paliwalb  

Terpolymers were prepared by the condensation of salicylic acid (S) and melamine (M) with formaldehyde (F) in the presence of 2M HCl as catalyst with varying molar ratios of reacting monomers. The electrical conductivity of SMF-1, SMF-2, SMF-3 and SMF-4 terpolymers was measured over a wide range of temperature (313-423 K) in their pellet form. From the electrical conductivity of these terpolymers, activation energies of electrical conduction have been evaluated. The electrical conductivity of terpolymers at room temperature declines in the order SMF-4 > SMF-3 > SMF-2 > SMF-1. The temperature dependence of the electrical conductivity in pellets of all terpolymers is of the same type but higher values of conductivity have been obtained in terpolymers with high molar ratios of salicylic acid. On the basis of above studies these terpolymers can be ranked as semiconductors.

Terpolymers; electrical conductivity; salicylic acid; melamine; formaldehyde

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