Preparation, Characterization and Comparison of Thermal Properties of Aromatic Polyether Imides

摘要

Two aromatic polyimides were prepared by two-step way. Firstly, the poly (amic acid) s were synthesized from 1,3-bis (4-aminophenoxy) benzene and two aromatic dianhydrides. Secondly, polyimides were prepared via thermal imidization of poly (amic acid) precursors. The polyimides prepared were insoluble in common organic solvents such as tetrahydrofuran, chloroform and N, N-dimethylformamide. The inherent viscosities of poly (amic acid) s were 1.82dL/g and 2.67dL/g. Experimental results indicated that the resulting polyimides showed exceptional thermal properties with excellent thermal stability and higher glass-transition temperature in nitrogen.