Some alicyclic poly‐1,3,4‐oxadiazoles were prepared from cycloalkanedicarboxylic dihydrazides or from cycloalkanedicarboxylic acids and hydrazine sulfate by solution polycondensation in polyphosphoric acid. These polymers were characterized by high melting temperature. Their preparations and physical properties, such as solubility, crystallinity and thermal stability, are described.
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Iwakura et al. (1966) studied this question.
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