Polymethylmethacrylate (PMMA) was modified with phenyl hydrazine (A) and hydrazine hydrate (B).The complexes of the modified polymers with copper (II) and nickel (II) ions (chlorides and acetates ) were prepared. The modified polymers and complexes were characterized by elemental analysis and IR spectroscopy . Thermal stabilities of polymer metal complexes were studied using thermogravimetric analysis (TGA). found that the thermal stabilities of polymer complexes higher than the homopolymers.