Oligo-2-[(2-hydroxymethylphenylimino) methyl] phenol O-(2-HMPIMP) and oligo-2-[(2-hydroxymethylphenyl imino) methyl]-5-bromo-phenol O-(2-HMPIMBP) were synthesized by the oxidative polycondensation reaction using air as an oxidant in an aqueous alkaline medium at 70 degrees C. They were characterized by H-1-NMR, FT-IR, UV-vis, TC, size exclusion chromatography (SEC) and elemental analysis. According to the SEC analyses, the number-average molecular weight (M-n), weight-average molecular weight (M-w) and polydispersity index (PDI) values of O-2-HMPIMBP and O-2-HMPIMP are 1100, 1600 g mol(-1) and 1.45; and 6000, 6250 g mol(-1) and 1.04, respectively. According to TG analyses, the weight losses of O-2-HMPIMP and O-2-HMPIMBP are 98.31% and 96.91%, respectively, at 900 degrees C.