Method of preparing polybenzimidazole

Details Method of preparing polybenzimidazole Method of preparing polybenzimidazole

C - Chemistry, Metallurgy

08

G

C08G 73/18 (2006.01)

Patent

CA 2666035

Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups acid dianhydride, obtaining polypyrrolone form the polyaminoimide, subjecting the polypyrrolone to alkaline-treatment, and subjecting the alkaline-treated polypyrrolone to heat- treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores.

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