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Polyamides having 1,2,4‐triazine rings in the main chain (6 and 7) were prepared from 3‐substituted 4,4′‐(1,2,4‐triazine‐5,6‐diyl)dibenzoic acids (5) and aromatic diamines. The thermal stability and the solubility of polyamides 6 and 7 were compared with those of structurally identical polyamides (polymers 3 and 4) obtained by polymer homologous reaction of polyamides having α‐diketone moieties with amidrazones. The effects of introduction of 1,2,4‐triazine‐5,6‐diyl unit in the main chain on the thermal stability and solubility of the polymers are discussed.
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Akutsu et al. (1987) studied this question.
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