The control of the mesoporous structure in a carbon membrane from a poly(et
hylene glycol)/polyimide-blended polymer was investigated. The size of the
pores tends to become large with increase of the content of poly(ethylene g
lycol) against polyimide, that is, the mesoporous structure could be contro
lled by the composition of the blended polymers. On the other hand, the ave
rage molecular weight; of poly(ethylene glycol) has little effect from the
viewpoint of the control of the pore structure. (C) 2000 John Wiley & Sons,
Inc.