本研究利用骨架上具有含氮雜環的3,8-benzo[c]cinnoline dicarboxylic acid(4)二酸單體，將其與聯苯四胺(3,3’-diaminobenzidine)在聚磷酸(PPA)中進行高溫關環聚合反應，合成新型聚并咪唑([c]-PBI)，並利用PPA process在玻璃板上直接加工成膜，除此，並利用benzo[c]cinnoline二酸單體與對-苯二甲酸(terephthalic acid)二酸單體，依不同的比例混合，與聯苯四胺(3,3’-diaminobenzidine)合成新型聚并咪唑，分別為80[c]20p-PBI、60[c]40p-PBI、40[c]60p-PBI、20[c]80p-PBI。
[c]-PBI系列高分子固有黏度(inherent viscosity，0.2 g/dL，MSA，30℃)為1.04~2.20。熱裂解溫度T5%與T10%分別為311~355 ℃和460~575 ℃。在800 ℃之char yield在74~77 %。[c]-PBI系列高分子利用PPA process製備的膜量測之ADL為23.66~34.17，在160 ℃時質子交換率為0.1211~0.2814 S/cm。而最後進行燃料電池測試時，開路電壓可測得0.59~0.76 V，最大電功率為327~669 mW/cm2。這一系列的數值證實[c]-PBI系列新型高分子可應用於高溫質子交換膜燃料電池。

The research is about combing 3,8-benzo[c]cinnoline dicarboxylic acid(4) containing nitrogen heterocyclic ring and 3,3’-diaminobenzidine into PPA under high- temperature condensation reaction to synthesize novel polybenzimidazole ([c]-PBI) and then form membrane through PPA process on the glass. It’s also about using 3,3’-diaminobenzidine and the mixture of benzo[c]cinnoline diacid and terephthalic acid to synthesize polyimidazole, such as 80[c]20p-PBI, 60[c]40p-PBI, 40[c]60p-PBI, 20[c]80p-PBI.
The inherent viscosity(0.2 g/dL，MSA，30 ℃) of [c]-PBI series range from 1.04 to 2.20. The temperatures of 5% weight loss (T5% ) ranges from 311 to 355 ℃. The temperatures of 10% weight loss (T10% ) ranges from 460 to 575 ℃. The char yield
at 800 ℃range from 74~77 %. The ADL of [c]-PBI series range from 23.66 to 34.17 and proton conductivity at 160 ℃ range from 0.1211 to 0.2814 S/cm. During the fuel cell test, the open circuit voltages range from 0.59 to 0.76 and power density ranges from 327 to 669 mW/cm2. The data prove that the [c]-PBI series can be applied to high temperature proton exchange membrane fuel cell.

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