A series of segmented copolyether-ester polyimides

based on the polycondensation of poly (tetramethylene oxide) glycol a

w-di-p-amino benzoate (APTMO)

4

4'-oxydianiline (ODA) and 1

2

4

5-benzene tetracaboxylic dianhydride (PMDA) was synthesized. The dynamic mechanical analysis (DMA) and the differential scanning calorimetry (DSC) techniques were used to study the morphology of these polymers. Their thermal stability

mechanical properties

gas permeability and dielectrical constants were also measured. The experiment results indicated that these polymers had multiphase structures and were a new type of thermoplastic elastomer.