Thermal Study of the newly synthesized organic polymer 8-HQ5-SAOF-II

R. N. Singru

Abstract

Thermal Study of the newly synthesized organic polymer 8-HQ5-SAOF-II

Author(s): R. N. Singru

The title terpolymer (8-HQ5-SAOF-II) synthesized by the condensation of 8-hydroxyquinoline 5- sulphonic acid (8-HQ5-SA) and oxamide (O) with formaldehyde (F) in the presence of acid catalyst and using 2:1:3 molar proportion of the reacting monomers. The morphology of synthesized terpolymer was studied by scanning electron microscopy (SEM). The thermogravimety of the terpolymer resin prepared in present study has been carried out by nonisothermal thermogravimety technique in which sample is subjected to condition of continuous increase in temperature at linear rate. Thermal study of the resin was carried out to determine the mode of decomposition and relative thermal stability. Thermal decomposition curve was studied carefully with minute details. The Freeman-Carroll and Sharp-Wentworth methods have been used in the present investigation to calculate thermal activation energy and different kinetic parameter of the terpolymer resin. The advantage of Freeman-Carroll method is to calculate both the order of reaction/ n and energy of activation in one single stage by keeping heating rate constant. By using data of thermogravimety, various thermodynamic parameters like frequency factor/ Z, entropy change/ DS, free energy change/DF and apparent entropy/ S* have been determined using Freeman-Carroll method.

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