An Improved Method for Preparing Very High Molecular Weight Polyimides

Instituto de Ciencia y Tecnologi´a de Poli ´meros, CSIC. Juan de la Cierva 3, 2006 Madrid, SpainReceived March 11, 2009; Revised Manuscript Received June 17, 2009Silylated diamines, as more nucleophilic reactants than dia-mines, were first reported as very suitable monomers for thesynthesis of aromatic polyamides by Oishi et al.