Interpentertatin polymer network(IPN) of polyurethane(PU)/polymethylmethacrylate(PMMA) membranes with different NOC/OF ratio were prepared and characterized by FT-IR spectroscopy, DEA, and SEM. The swelling bebavior and pervaporation characteristics for the benzene/cyclohexane mixtures through these membranes were also evaluated. From the results of electrical properties measurement by DEA, it was found that T_g values of PU and PMMA were increased by increasing NOC/OH ratio. The swelling of membrane was depressed with the increase of the NCO/OF ratio. The separation factor increased and the flux devreased when NCO/OH ratio was increased. All the membranes exhibited a high benzene selectivity for the benzene/cyclohexane mixtures of low benzene concentration and the IPN3.753M7 membrane, where the NCO/OH molar ratio was 3.75 and PU/PMMA was 30 : 70 wt%, showed the excellent selectivity. The selectivity decreased and the flux increased by increasing the temperature of the fee solution.

NCO/OH Ratio가 다른 PU/PMMA IPN막을 합성하여 FT-IR, DEA, SEM, 팽윤도 실험 및 벤젠/사이클로헥산 혼합 용액에 대한 투과증발 분리 실험을 행하였다. DEA에 의한 막의 전지적 특성 조사 결과 NOC/OF ratio가 증가할수록 PU와 PMMA에 해당하는 각각의 Tg

Keywords: interpenetrating polymer network; polyurethane; polymethylmethacrylate; benzene/cyclohexane mixture