High-molecular-weight polyketanils with flexible ether linkages were prepared by the reactions of N,N'-bis[a-(4-fluorophenyl)benzylidene))-1,4-benzenediamine with phenoxides derived from several less acidic diphenois. Molecular sieves mediated reactions of 1,4-benzenediamine with two equivalents of 4-fluorobenzophenone afforded the desired monomer in good yield. Formation of successive ether linkages via nucleophilic aromatic substitution reactions constituted the polymerforming step. The high-molecular-weight polymers form tough films upon compression molding, exhibit relatively high glass transition temperatures and good thermal stability. 0 1993, Hiithig & Wepf Verlag, Base1 CCC 0025-1 16)93/$05.00
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