Method of making polybenzimidazole

摘要

A method of making a polybenzimidazole (PBI) includes the steps of: reacting, in a solution, an organic compound having at least 2 amino groups with an organic aldehyde adduct, the reactants comprise at least 8% by weight of the solution. A solvent of the solution may be selected from the group of: N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), tetramethylene sulfone, and combinations thereof. The organic aldehyde adduct may be an organic aldehyde bisulfite adduct. The organic aldehyde portion of the organic aldehyde adduct being aliphatic, alicyclic, aromatic, heterocyclic, or heteroaromatic aldehyde or mixtures thereof. The polybenzimidazole may have an intrinsic viscosity of at least 0.40 dl/g.

主权项

1. A method of making a polybenzimidazole fiber or film comprising the steps of:
reacting, in a solution,
an organic compound having at least 4 amino groups withan organic dialdehyde bis(bisulfite) adduct,the reactants comprise at least 8% by weight of the solution,
forming a polybenzimidazole polymer with an intrinsic viscosity (IV) in concentrated sulfuric acid of at least 0.50 dl/g, and forming the polybenzimidazole polymer into the fiber or film.