Polymers containing anthraquinone units: Polycondensations 1,2,5,6‐tetraaminoanthraquinone with some tetrachloroquinoxaline compounds

Abstract New ladder and partial ladder aromatic heteropolymers have been synthesized from 1,2,5,6‐tetraaminoanthraquinone, 2,3,7,8‐tetrachloro‐1,4,6,9‐tetraazaanthracene, 2,2′‐3,3′‐tetrachloro‐6,6′‐diquinoxaline, 2,2′,3,3′‐tetracholoro‐6,6′‐diquinoxalyl ether and 2,2′,3,3′‐tetrachloro‐6,6′‐diquinoxalyl sulfone. The polycondensations were carried out in solution and in melt. The inherent viscosities of polymers were in the range of 0.1‐0.44. These polymers were highly colored, showed good thermal stability and were soluble in concentrated sulfuric acid and methanesulfonic acid. The structures of the polymers were established by comparison with model compounds.