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.