Preparation and characterization of nanoporous polyimide films from triblock copolyimides.
Nanoporous polyimide films were prepared from triblock copolyimides. A thermally labile polymer, poly(propylene glycol), was incorporated into polyimides based on 4,4-(hexafluoroisopropylidene)diphthalic anhydride to obtain triblock copolyimides. Nanofoams were formed by thermolysis of the labile block. The thermal properties of the copolymers were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The nanopores were characterized by scanning electron microscopy (SEM).
Cho
Sung-Youl
SY
Department of Chemistry, Yonsei University, Wonju 220-710, Republic of Korea.
Lee
Chang-Hyung
CH
Oh
Se Young
SY
Chung
Chan Moon
CM