Authors : Dr.Kamlakar Nandekar , Dr. Shailesh Mandavgade
Abstract – The Copolymer (SATF-III) was synthesized by polycondensation of Salicylic acid and Thiosemicarbazide with formaldehyde in the presence of 2M HCL as a catalyst at 126±2 0C for 5 hrs. with molar proportion of reactants. Thermo gravimetric analysis of (SATF-III)copolymer resins in present study have been carried out by non-isothermal thermo gravimetric analysis technique, in which sample is subjected to condition of continuous increase in temperature at linear rate. Thermal study of the resins was carried out to determine their mode of decomposition and relative thermal stabilities. The copolymer (SATF-III) was characterized by FT-IR, 1H-NMR Spectroscopy.. Thermal activation energy (Ea) calculated with above two mentioned methods are in close agreement. Freeman Carroll and Sharp-Wentworth methods were used to calculate the thermal activation energy (Ea), the order of reaction (n), entropy Change (∆S), free energy change (∆F), apparent entropy change (∆S), and frequency factor (Z). The thermal activation energy determined with the help of these methods was in good agreement with each other.
