Toluene-3,4-diamine was prepared by catalytical hydrogenation of 2-nitro-4-aminotoluene at atmospheric pressure and 40 ℃ in the presence of catalyst Urushibara
Three poly(aryl ether sulfone)s containing 1,4-naphthylene moiety were prepared by the nucleophilic polycondensation of 1-chloro-4-(4-chlorobenzenesulfonyl)naph