摘要:
The invention provides a substituted polybenzimidazole product produced by employing a cyclic carbonate to attach hydroxyalkyl substituents at the reactive imidazole hydrogen sites on the polybenzimidazole polymer. The substituted polybenzimidazole polymer membranes produced by this process exhibit improved hydrophilicity and chemical stability over prior art polybenzimidazole membranes. Substituted polybenzimidazole polymer ultrafilters produced by this process filter a broad range of molecular weight compounds.
摘要:
This invention provides a process for modifying a polybenzimidazole polymer which involves employing ethylene carbonate as a hydroxyethylating agent to introduce 2-hydroxyethyl substituents at active imidazole hydrogen sites in the polymer. The polymer product exhibits improved hydrophilicity.