%0 journal article %@ 0024-9297 %A Al-Masri, M., Kricheldorf, H.R. %A , Fritsch, D. %D 1999 %J Macromolecules %N 23 %P 7853-7858 %T New Polymides for Gas Separation I: Polymides Derived from Substituted Terphenylenes and 4,4ยด-(Hexafluoroisopropylidene)diphthalic anhydride %U 23 %X