[en] Interaction of hydrazine hydrate aqueous solution with radiation-grafted copolymers of low density polyethylene and polytetrafluoroethylene, containing chains of polymethylacrylate, polymethylmethacrylate, polyacrylic and polymethacrylic acids has been studied. All the monomers were grafted by the direct method in argon medium at gamma-radiation dose rate of 0.3-33 kGy/h in the dose range of 0.3 6.0 kGy. It was ascertained that in the process of interaction between chains of polyacrylic and polymethacrylic acids and hydrazine hydrate formation of cyclic and laced structures takes place, meanwhile in the case of polymethylacrylate hydrazide groups are formed