| 초록 |
A novel dimaine monomer, 2,2'-bis(4,4'-diaminophenyl)bithiophene(2TDA), was synthesized and utilized to prepare polyimides. First, 5,5’-bis(trimethyltin)-2,2’-bithiophene(2S2T) was prepared from bithiophene and trimethyltinchloride, and subjected to Stille coupling reaction with 4-bromonitrobenzene, resulting in 2,2'-bis(4,4'-dinitrophenyl)bithiophene(2TNP). Then, it was hydrogenated to afford 2TDA. The monomer was characterized by FT-IR, NMR, melting point analyzer and GC/MS, and utilized to prepare polyimides with dianhydrides such as 3,6-diphenylpromellitic dianhydride (DPPMDA), 3,6-di(4'-trifluoro-methylphenyl)pyromellitic dianhydride(6FPMDA) and 3,6-di(3',5'-bis(trifluoromethyl)phenylpyromellitic dianhydride(12FPMDA). The polymers were synthesized via a conventional two-step process; preparation of poly(amic-acid), followed by solution imidization, and characterized by FT-IR, NMR, TGA, DSC and GPC. In addition, optoelectronic properties were evaluated by CV, UV-vis and PL. |
