Schiff base sal-2.5-clan = 2-(2,5-dichlorobenzylideneamino)phenol was used as a new precursor for preparation of poly-2-(2,5-dichlorobenzylideneamino)phenol (PDCBAP). In an aqueous alkaline medium, NaOCl oxidant is capable of oxidative poly-condensation reaction (OP). Both sal-2,5-clan and PDCBAP were characterized by solybility tests, FT-IR, 1HNMR spectroscopy and TG-DTG studies. FTIR and 1H-NMR spectrum of PDCBAP indicates the formation of Ar-O-Ar bond. according to TG/DTA curves, PDCBAP demonstrated higher resistance against temperature than sal-2,5-clan. At optimum reaction conditions, viz. time = 14h, [NaOCl]= 0.12 M, [KOH] = 0.1 M and T = 90 0C, the yield of PDCBAP is 52.17 %. thermal studies indicated that PDCBAP is more stable than sal-2,5-clan
