synthesis and characterization of schiff-base polymer derived from 2,5-dichloroaniline and 2-hydroxybenzaldehyde

schiff base sal-2,5-clan = 2-(2,5-dichlorobenzylideneamino)phenol 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 solubility tests, ft-ir, 1h-nmr spectroscopy and tg-dta studies. ft-ir 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 = 0.12 m, [koh]0 = 0.1 m and t = 90°c, the yield of pdcbap is 52.17%. thermal studies indicated that pdcbap is more stable than sal-2,5-clan.