Soluble polybenzimidazoles (PBI's) synthesized by nucleophilic displacement reaction of di(hydroxyphenyl)-benzimidazole monomers with activated aromatic difluoride compounds in presence of anhydrous potassium carbonate. These polymers exhibit good thermal, thermo-oxidative, and chemical stability, and high mechanical properties. Using benzimidazole monomers, more economical, and new PBI's processed more easily than commercial PBI, without loss of desirable physical properties.
Polybenzimidazoles Via Aromatic Nucleophilic Displacement
NASA Tech Briefs ; 18 , 5
1994-05-01
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English
Polybenzimidazoles Via Aromatic Nucleophilic Displacement
Online Contents | 1994
Polyimidazoles Via Aromatic Nucleophilic Displacement
NTRS | 1990
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