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The low temperature solution polymerization of aromatic bisamidoximes and aromatic dicarboxylic acid chlorides was studied. Fully aromatic polyetherpoly‐O‐acylamidoximes of high molecular weight were obtained, which were transformed into thermally Stable aromatic polyetherpoly‐1.2.4‐oxadiazoles by thermal cyclodehydration. As a new monomer, diphenylether‐4.4′‐dicarboxylic acid chloride was, prepared. The solubility of copolymers of poly‐O‐acylamidoximes with the ether linkages along the polymer chain was found to be remarkably improved compared with the corresponding, aromatic poly‐O‐acylamidoximes. The conditions of the cyclopolycondensation reaction and the characterizations of the resulting polymers are described.
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Dokoshi et al. (1967) studied this question.
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