Soluble polyamic acid salt (PAAS) precursors comprised of tertiary and quaternary amines, ammonium cations, sulfonium cations, or phosphonium cations, are prepared and fabricated into membranes that are subsequently imidized and converted into rigid-rod polyimide articles, such as membranes with desirable gas separation properties. Method of enhancing solubility of PAAS polymers in alcohols is disclosed.
由叔胺和季胺、
铵阳离子、锍阳离子或
鏻阳离子组成的可溶性聚酰胺酸盐(P
AAS)前体被制备和制造成膜,这些膜随后被
酰亚胺化并转化成硬棒聚
酰亚胺制品,例如具有理想气体分离性能的膜。公开了提高 P
AAS 聚合物在醇中溶解度的方法。