AbstractComb‐branched copolymers containing ethylene amine side chains of the general structure ‐NH(CH2CH2NH)xH with x=1, 2, 3 and 4, were prepared by the reaction of poly(monoalkyl‐codialkyl itaconate)s, using an excess of the appropriate diamine in the presence of dicyclohexylcarbo‐diimide. Incorporation of ethylene amine units in the itaconate copolymers resulted in an increase in the glass transition temperature (Tg) and in the complex modulus of the modified copolymers aboveTg. Both effects were proportional to the ethylene amine content of the copolymers. Chemical modification also occurred when samples were heated to about 450 K when imide formation was