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Abstract
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Aromatic polyimides (PIs) are a class of advanced materials because of their high temperature stability, excellent mechanical and electrical properties, and good chemical resistance (1). However, their applications have been limited in some fields because aromatic PIs are normally insoluble in common organic solvents and have high melting points (2). The objective of this study was the preparation of novel thermally stable and organosoluble PIEs with photophysical properties. Therefore, new aromatic diamines bearing flexible ether linkages and 2,3-diaryl imidazole chromophore and CF3 pendant groups were synthesized. The diamines was polymerized with various dianhydrides with using NMP-pyridine-acetic anhydride (Scheme 1). The poly (ether-imidazole-imide) (PEII)s were obtained in good yields (80-96%).The resulting polymers were fully characterized and their properties such as solubility, viscosity, crystallinity, thermal and photophysical were investigated. The PIs are amorphous and soluble in polar aprotic solvents and their inherent viscosities ranged from 0.45 to 0.86 dL/g.
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