| 초록 |
A novel fluorinated diamine monomer, 4, 4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl Ether, was prepared through the nucleophilic substitution reaction of 2-chloro-5-nitrobenzotrifluoride with 4,4'-dihydroxydiphenyl ether in the presence of potassium carbonate, followed by catalytic reduction with hydrogen gas and Pd/C. Polyimides were synthesized from diamine and various aromatic dianhydrides via thermal and chemical imidization. Polyimides were soluble in amide polar solvents and even in less polar solvents. The polyimides exhibited exceptional thermal stability, comparatively low dielectric constants, and excellent optical properties. The outstanding features of the synthesized transparent polyimides are desirable candidate materials for advanced optoelectronics applications. |
