Polymeric phthalocyanines and their precursors, 10. Thermal stability of polymeric phthalocyanines and their low molecular analogues

Abstract The thermal stabilities of structurally uniform polymeric phthalocyanines 2 and their lowmolecular‐weight model compounds 5 were examined. Thermal analyses under inert and oxidative conditions showed that the nature of the metal as well as that of the substituents and end groups has a decisive influence on the thermal stability. Polymers 2 turned out to be less stable as compared to their low‐molecular‐weight analogues 5 . Generally, the stability under inert conditions was found to be higher than under oxidative conditions. For polymer 2b (Mt = Cu) it could be shown that 400°C must not be exceeded during its synthesis, whereas the polymer withstands isothermic temperatures of up to 500°C without decomposition.