Poly terephthaloyl oxamidrazone

Oxamidrazone is produced from dicyanogen and hydrazine. After isomerization with terephthaloyl chloride, oxamidrazone converts to poly-(terephthaloyl oxamidrazone) (PTO), which can be converted to a polytriazole, a poly(oxadiazole), or a metal-ion-chelating polymer  

The color of the chelated PTO varies according to the nature of the metal and the mole ratio of metal to PTO. The variation is between yellow (Zr /PTO = 0.35), through orange (Zn /PTO = 2) and olive green (Cu +/PTO = 0.66) to brown (Ca +/PTO = 1) and black (Fe /PTO = 1). White and blue shades cannot be obtained. 

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However, materials from poly(bis-l,2,4-triazole)s can be formed by dissolving poly(acyl oxamidraz-one)s, e.g., poly(terephthaloyl oxamidrazone) in dilute aqueous alkali. The solution is then spun or poured into a precipitation bath [9]. The filaments or foils that are formed are washed and heated in an inert gas to a temperature of 240-320 °C. 

Enkatherm Poly(terephthaloyl oxamidrazone) AKZO, The Netherlands... 

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