Alternating current conductivity and dielectric properties of newly prepared poly(bis thiourea sulphoxide)

Poly(bis-thiourea sulphoxide) was prepared by Michael addition mechanism of thiourea with bis-sulphinyl thiourea, which in turn, was prepared by the reaction of thiourea with thionyl chloride. The formed polymer was identified by microchemical analysis and IR spectrum. Thermogravimetric analysis shows that it is stable up to 490°K, and having thermal activation energy 11.2 K cal·mol m 1 . It is of relatively low molecular weight as found from the inherent viscosity value (0.242 dLg m 1 ). Alternating conductivity measurements at different temperatures and frequencies exhibited that the prepared polymer is a highly polarized material. The relaxation time of the orientational process is about 9 2 10 m 11 second and the activation energy of this process is 0.387 eV. The conduction mechanism could be attributed to the correlated barrier hopping (CBH) model.