公开(公告)号：US10563013B2

公开(公告)日：2020-02-18

申请号：US15573273

申请日：2016-05-13

申请人： Technische Universität Wien

发明人： Miriam Margarethe Unterlass ,  Bettina Baumgartner

IPC分类号： C08G73/10

摘要： A solvothermal synthesis process for polyimides is provided. The process uses solution polymerization of monomers in an appropriate solvent, by mixing the solvent and the monomers and heating the mixture under pressure at temperatures exceeding the respective boiling point at normal pressure. The process produces essentially completely crystalline polyimides by a) mixing and heating the solvent and the monomers by either (i) heating the solvent up to solvothermal conditions and subsequently adding the monomers to initiate the reaction, or (ii) mixing the monomers with the solvent and heating the mixture up to solvothermal conditions within a period of 5 min, the reaction temperature TR being held below the solid-state polymerization temperature TP of the monomers during the polymerization; and b) carrying out the solution polymerization until essentially complete conversion is achieved.