Study of electrical property, adsorption chromatography and thermalstability of p-cresol and oxamide with formaldehyde terpolymer resin-IV

[摘要] Terpolymer resin p-COF-IV was synthesized by the condensation polymerization of reacting monomers. The electrical property of p-COF-IV terpolymer was measured over a wide range of temperature (313-423K), activation energy of electrical conduction has been evaluated and plot of log s vs 103/T is found to be linear over a wide range of temperature, therefore can be ranked as semiconductor. The adsorption chromatography chelating ion-exchange properties of this terpolymer was studied for Fe (III), Cu (II), Ni (II), Co (II), Zn (II), Cd (II) and Pb (II) ions. A batch equilibrium method was employed in the study of the selectivity of metal ion uptake. The study was carried out over a wide pH range, shaking time and in media of various ionic strengths. The terpolymer showed a higher selectivity for Fe (III), Cu (II), and Ni (II) ions than for Co (II), Zn (II), Cd (II) and Pb (II) ions. Thermal study of the resin was carried out to determine its mode of decomposition and thermal stability. The Freeman-Carroll and Sharp- Wentworth methods have been used in the present investigation to calculate thermal activation energy. And different kinetic parameter like frequency factor (Z), entropy change (DS), free energy change (DF) and apparent entropy (S*) have been determined using Freeman-Carroll method.

[学科分类] 药理学