| 摘要 |
PURPOSE:To obtain the cation-exchange carbon body with the material not deteriorated before an exchange group is introduced by heating polycarbodiimide resin to obtain a carbonized precursor, sulfating and oxidizing the precursor. CONSTITUTION:The polycarbodiimide resin contg. the homopolymer or copolymer consisting of at least one kind of repeating unit shown by the formula (-R-N=C=N-)n is produced from an org diisocyanate. The resin is dissolved in a solvent (e.g. tetrachloroethylene), and the soln. is formed into a desired shape such as film. The formed resin is heated at 500-1500 deg.C in vacuum or in an inert gas atmosphere to obtain a high strength carbonized precursor. The precursor is heated in concd. sulfuric acid or fuming sulfuric acid, sulfated and oxidized to obtain a cation-exchange body. The material is not deteriorated by this method before an exchange group is introduced. |
