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Despite the presence of bulk literature on polybenzimidazole (PBI), unavailability of readily soluble and processable PBI remains as the tallest challenge for the end-use. N-alkyl PBIs (N-PBIs) were synthesized by grafting the alkyl chain in the imidazole backbone to resolve this key constrain. The chain length of substituted alkyl groups was varied to evaluate the influence of chain size on the structures...
Thermoreversible gelation of polybenzimidazole (PBI) in phosphoric acid (PA) is investigated by studying the gel morphology, thermodynamics of the gelation, and gelation kinetics utilizing test tube tilting and UV–Vis spectroscopy techniques. Gelation kinetics studies reveal that both the gelation rate and critical gelation concentration (C ∗t=∞ ) are function of gelation temperature...
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