Two series of polyimides containing 1,3,4-oxadiazole rings in the main chain, one of them having flexible hexafluoropropane-2,2-diyl groups and the other with carbonyl groups, were prepared by polycondensation of aromatic diamines containing 1,3,4-oxadiazole rings with hexafluoropropane-2,2-diyl-bis(phthalic anhydride) or benzophenonetetracarboxylic dianhydride. Their properties, such as solubility in organic solvents, thermal stability, glass transition temperature, photoluminescence and film-forming properties of the two groups of polymers have been studied and compared.
两系列聚酰亚胺含有主链中的1,3,4-噁二唑环,其中一个具有柔性的六氟丙烷-2,2-二基基团,另一个具有羰基基团,通过含有1,3,4-噁二唑环的芳香二胺与六氟丙烷-2,2-二基-双(邻苯二甲酸酐)或苯并苯酮四羧酸二酐的聚缩合制备而成。研究和比较了这两组聚合物的性质,如在有机溶剂中的溶解度,热稳定性,玻璃化转变温度,光致发光和薄膜形成性能。