The synthesis of polymers based on anthranillic acid( o-amino benzoic acid) ,p-chloroaniline and o-methylaniline by aniline–initiated ammonium peroxydisulfate oxidation method has been attempted. Poly(anthranillic acid),poly(p-chloroaniline ),and poly(orthomethylaniline) thus synthesized were characterized by using infrared spectroscopy(FTIR),1H –nuclear magnetic resonance spectroscopy(1H-NMR),X-ray diffraction (XRD) and thermo gravimetric analysis(TGA). The TGA analysis of the conducting polymers have been followed using a computer analysis method LOTUS PACKAGE, developed by us for assigning the degradation mechanism. The degradation pattern of the polymers has been explained on the basis of kinetic parameters .