Di(hydroxyphenyl)benzimidazole monomers were prepared from phenyl-4-hydroxybenzoate and aromatic bis(o-diamine)s. These monomers were used in the synthesis of soluble polybenzimidazoles. The reaction involved the aromatic nucleophilic displacement of various di(hydroxyphenyl)benzimidazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds in the presence of an alkali metal base. These polymers exhibited lower glass transition temperatures, improved solubility, and better compression moldability over their commercial counterparts.
Di(羟基苯基)
苯并咪唑单体由苯基-
4-羟基苯酸酯和芳香族双(o-二胺)制备而成。这些单体被用于合成可溶性聚
苯并咪唑。反应涉及不同的Di(羟基苯基)
苯并咪唑单体与活性芳香族二卤化物或活性芳香族二
硝基化合物在碱
金属碱存在下的芳香族亲核置换。这些聚合物具有比商业对应物更低的
玻璃化转变温度,改善的溶解度和更好的压缩模塑性。