Oxamidrazone

Poly(bis-l,2,4-triazole)s are a class of polymers in which two triazole rings are immediately adjacent. These polymers can be obtained by the reaction of oxalic acid bis-amidrazone with aromatic dicarboxylic acid dihalides or with fumaroyl chloride and subsequent cyclodehydration of the poly(acyl oxamidrazone)s. The process is shown in Figure 9.3. 

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

Oxamidrazone, NHj—NH—C(NH)—C(NH)—NH—NH2, is produced from dicyan and hydrazine, and its isomer converted with terephthaloyl chloride to poly(terephthaloyl oxamidrazone), PTO. PTO can be converted to a poly(triazole), a poly(oxadiazole), or to a metal ion chelated polymer ... 

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

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