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The synthesis, characterization, thermal degradation and stability of polyaniline (PANI), poly(m-nitroaniline), poly(m-chloroaniline) and poly(o-methylaniline) were reported. Different properties were measured and compared with PANI to find out the effect of electron donating groups (−CH3) and electron withdrawing groups (−Cl, t—NO2). It was found that the presence of any type of substitution in the...