A series of complexes from poly(itaconic acid) and poly(mono methyl itaconate) and alkyltrimethylammonium bromide surfactants with linear alkyl groups, containing even number of carbon atoms from 12 up to 22 were synthesized. The complexes were obtained in good yields and were soluble in organic solvents and stable up to temperatures near 150 degrees C. On the other hand, the paraffinic side chains are able to crystallize depending on the methylene number of the surfactant n-alkyl chain.