| 摘要 |
The present invention relates to a novel synthesis method of polyimide, and more specifically, to a synthesis method of polyimide, in which a dianhydride compound and a diamine compound are dispersed in water, and reacted in a sealed pressure container at a temperature condition of 5C or above in a pressurized state to produce polyimide. The synthesis method of polyimide according to the present invention utilizes water as a dispersion medium without generating organic-based liquid waste, and is thus environmentally friendly, and has the advantages of low synthesis cost and minimizing the amount of a residual solvent after drying, thereby ameliorating the problem of reduced physical properties due to the residual solvent. Further, the present synthesis method has the advantages of lower reaction temperature, less reaction steps and shorter reaction time compared to the conventional method. Also, the polyimide synthesized above has higher thermal stability and larger molecular weight than the polyimide synthesized through the conventional synthesis method. |
