p-Nitroazobenzene 함유한 Polyamic Acid의 합성과 수면상의 변위전류 측정 = The Synthesis of Polyamic Acid containing p-Nitroazobenzene and the Measurement of Displacement Current on the Water Surface

다국어 초록 (Multilingual Abstract)

The synthesis of polyamic acid was studied to get optimized conditions. The spectrum of the product of reaction containing azobenzene chromophres was investigated by using ultraviolet spectrophotometry in various solvent at room temperature. Recrystallization of reaction product in ethanol solvent atomosphere results 73.2% monomer, 78.6% anhydride tetracarbonic acid, and 96% polyamic acid.
Maxwell displacement current（ＭＤＣ）measuring technique has been applied on the study of monolayers of polyamic acid. The displacement current was generated from monolayers on the water surface by monolayer compression and expansion. Displacement current was generated when the area per molecule was about 250Ųand 120Ų. The charge flow and Maxwell displacement currents were investigated in connection with monolayer compression cycles. It was found that The maximum of ＭＤＣｓ appeared at the molecular area just before the initial rise of surface pressure in both １st and ２nd compression cycles.