Carboxylic acids and derivatives having a general formula X-O-Ar-O-Y in which X and Y are aromatic mono or di-basic carboxylic acid groups of derivatives which may be the same or different. Ar is a divalent aromatic group having at least one tertiary alkyl substituent and not more than one such substituent ortho to each of its bonds to the ether groups. A polyetherimide is prepared by reacting an anhydride derivative of the above formula with a diamine. Gas separation membranes can be fabricated from the resultant polyetherimides.
A Comparison of Poly(ether imide)s with 3-Phthalimide and 4-Phthalimide Units: Synthesis, Characterization, and Physical Properties
作者:G. C. Eastmond、J. Paprotny、R. A. Pethrick、F. Santamaria-Mendia
DOI:10.1021/ma0524732
日期:2006.10.1
Bis(ether anhydride)s with 3- or 4-phthalimide moieties were prepared by reacting 3- or 4-nitrophthalodinitrile, respectively, with several diols and converting the resulting bis(ether dinitrile)s to bis(ether anhydride)s. Selected dianhydrides were converted into poly(ether imide)s in a two-stage solution polymerization and imidization process. It was found that, in most cases, the dianhydrides with