Thermal characteristics of iron(III), cobalt(II), and copper(II) complexes of dipyridylamine anchored on polystyrene‐divinylbenzene copolymer

摘要

AbstractPolystyrene‐divinylbenzene (PS‐DVB) (partially chloromethylated) has been modified by anchoring dipyridylamine (DPA) followed by subsequent complexation with Fe(III), Co(II), and Cu(II). Analytical and spectroscopic evidence has been presented to confirm the attachment of the metal‐dipyridyl complex on the PS‐DVB matrix. All the metal‐loaded polymers exhibit appreciable improvement in thermal stability relative to the base polymer, the initial decomposition temperature and stability order being PS‐DVB‐DPA‐Cu(315°C)>PS‐DVB‐DPA‐Fe(II) (310°C)>PS‐DVB‐DPA‐Co (300°C)>PS‐DVB‐DPA (280°C) = PS‐DVB.DTA studies reveal exothermic peaks between 300 and 380°C, 420 and 440°C, and 500 and 700°C, which are ascribable to the exothermic cleavage of the PS‐DVB‐DPA matrix. The glass transition temperatures of the modified polymers do not reveal any characteristic difference from the corresponding value for t