本研究由4,4’-oxydianiline(4,4’-ODA)經氧化、溴化、鈴木偶合反應與還原成功合成一新型二胺2,2’-bis[3,5-bis(trifluoromethyl)phenyl]-4,4’-oxydianiline(5)，再與4,4'-(hexafluoroisopropylidene)diphthalic anhydride(6FDA)經一步法合成新型聚醯亞胺(PI-12F)。而此新型聚醯亞胺展現出低介電常數與高光學穿透度。PI-12F可於室溫下溶於一般有機溶劑，甚至是丙酮，玻璃轉移溫度(Tg)為245 ℃，熱裂解溫度(T5%)為505 ℃、紫外光-可見光光譜截止波長(λcut-off)為361 nm、穿透度80%時的紫外光-可見光光譜波長(λ80%)為410 nm、介電常數為2.6。為了提升PI-12F的性質，將其進一步與二氧化矽、二氧化矽中空球、二氧化鈦進行混摻，分別製備成複合薄膜PI-12F/S、PI-12F/HS、PI-12F/T系列。三種複合薄膜的玻璃轉移溫度(Tg)介於241~250℃，熱裂解溫度(T5%)介於446~504 ℃。藉由本研究的實驗可以推測，二氧化矽中空球的介電常數約在2.7~3.3之間。若高分子基材之介電常數低於2.7，則混摻二氧化矽中空球後介電常數會上升。若高分子基材之介電常數高於3.3，混摻二氧化矽中空球後介電常數則會下降。PI-12F/S與PI-12F/T系列的UV-vis截止波長介於377~406 nm，UV-vis λ80%介於432~484 nm，折射率則介於1.52~1.61。將PI-12F、PI-12F/S系列與PI-12F/T系列做為軟性基板製備為有機發光二極體(organic light emitting diode, OLED)，其中以PI-12F/40T做為基板的OLED表現優異，其發光效率高達12.6 Cd/A，比以玻璃做為基板的OLED發光效率(Cd/A)增加了28%，故以PI-12F/40T做為軟性基板能成功製備成具有高發光效率的OLED。

A novel diamine, 2,2’-bis[3,5-bis(trifluoromethyl)phenyl]-4,4’-oxydianiline (5) was synthesized by oxidation, bromination, Suzuki coupling reaction, and reduction from 4,4’-ODA. A novel polyimide(PI-12F) was prepared based on this novel diamine and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride(6FDA) by one-step method. The novel polyimide exhibited low dielectric constant and high optical transparency. PI-12F could dissolve in common organic solvents, even acetone at room temperature. The glass transition temperature (Tg) was 245℃.The 5% weight-loss temperature was 505℃.The UV-vis cut-off wavelength was 361 nm. The UV-vis λ80% was 410nm. The dielectric constant was 2.6. In order to enhance the properties of the PI-12F, PI-12F was further blended with silica, hollow silica sphere and titania to prepare the hybrid films (PI-12F/S, PI-12F/HS, PI-12F/T series). The glass transition temperature (Tg) of these three series of hybrid films were in the range of 241~250℃. The 5% weight-loss temperature were in the range of 446~504℃. We could presume the dielectric constant of hollow silica sphere was in the range of 2.7~3.3. If the dielectric constant of the polymer matrix was below 2.7, then the hollow silica sphere would increase the dielectric constant of the polymer. If the dielectric constant of the polymer matrix was above 3.3, then the hollow silica sphere would decrease the dielectric constant of the polymer. The UV-vis cut-off wavelength of PI-12F/S and PI-12F/T series were in the range of 377~406 nm. The UV-vis λ80% were in the range of 432~484nm. The refractive index were in the range of 1.52~1.61. Flexible OLEDs were fabricated with PI-12F, PI-12F/S and PI-12F/T series as substrates. The efficiency of OLED with PI-12F/40T as substrate was 12.6 Cd/A. Compared with the OLED with glass substrate, the efficiency of OLED with PI-12F/40T increased 28%. Therefore, PI-12F/40T would be a potential flexible substrate for flexible OLED.

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