Novel organosoluble and thermally stable polyetherimides based on a new dianhydride monomer 2,6-bis-(isobenzofuran-1,3-dione-5-yl)pyridine (BIDP)

Abstract

ABSTRACTA series of organosoluble and thermally stable polyetherimides (PEIs) containing pyridine moieties and flexible ether linkages are synthesized based on a new aromatic dianhydride, 2,6-bis-(isobenzofuran-1,3-dione-5-yl)pyridine (BIDP). The prepared polymers are soluble in common aprotic solvents such as DMF, DMSO, NMP and DMAc at room temperature. Thermal behavior of the PEIs is studied by thermogravimetric analysis/dynamic thermal analysis (TGA-DTA). The inherent viscosities of the PEI solutions are in the range of 0.61–0.70 dL/g (in DMSO with a concentration of 0.25 g/dL at 25±0.5°C). The metal ion uptake capacity of PEI-4 for Co(II) removal from aqueous solutions is shown to be remarkably higher than that of the polyimide (PI) with a similar structure reported earlier.