热稳定性
苯甲酸
试剂
微波辐射
材料科学
分子质量
缩聚物
辐照
高分子化学
化学
微波食品加热
聚合物
有机化学
催化作用
酶
核物理学
物理
量子力学
作者
Jessica Olvera‐Mancilla,Joaquín Palacios‐Alquisira,Larissa Alexandrova
标识
DOI:10.1177/0954008317716977
摘要
The polycondensations of 3,3′-diaminobenzidine with two acids, 4,4′-oxybis(benzoic acid) and hexafluoroisopropylidene bis(benzoic acid), were conducted in Eaton’s reagent at the unusually high temperature of 180°C and under microwave irradiation at 90°C. Both protocols resulted in soluble polybenzimidazoles, OPBI and CF 3 PBI, of high molecular weights in very short reaction times. The synthesized polybenzimidazoles exhibited high thermostability and excellent mechanical properties. The influence of the reaction conditions on the polymer structure and molecular weights was studied. The “microwave effect” was demonstrated by comparison of the polycondensations conducted under microwave irradiation and conventional heating.
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