| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to a method of producing aromatic polybenzimidazoles involving formation of intermediate polyamidines in 1-Bu-3-MeImCl/AlCl3, 1-Et-3-MeImCl/AlCl3, 1-Bu-2,3-Me2ImCl/AlCl3, 1-Bu-3-MeImBr, 1-Bu-3-MeImBF4 type ionic liquids during reaction of aromatic dinitriles with diamines at temperature 160-190C for 15-17 hours, which further undergo oxidative dehydrocyclisation under the effect of sodium hypochlorite in the presence of a base at 100C for 4-8 hours. ^ EFFECT: novel method of producing polybenzimidazoles, characterised by that synthesis takes place in milder conditions and based on stable and available monomers; possibility of increasing molecular weight of polymers; improved physical and mechanical characteristics of the materials. ^ 2 tbl, 4 ex |
