The resin PHBG was prepared by polycondensation of p-hydroxyacetophenone, Bis (2-amino-1, 3, 4-thiadiazole) and glycerol in presence of DCC (dicyclohexylcarbodiimide). PHBG was prepared by condensing the monomers phydroxyacetophenone and Bis (2- amino -1, 3, 4- thiadiazole) with glycerol using molar ratio 1:1:3. The tentative structure of resin was assigned by elemental analysis, 1H NMR, 13 C NMR, FT-IR and UV-VIS spectra. The molecular weight of resin was determined by non aqueous conductometric titration. The thermo kinetic parameters such as apparent entropy (ΔS), frequency factor (A), free energy change (ΔG) and order of reaction were determined by Freeman Carroll (FC) and Sharp Wentworth (SW) methods. The order of degradation determined by FC method was confirmed by SW method.