In this work, poly(ether ether sulfone) (PEES) was synthesized by polymerization of dichlorophenyl sulfone and hydroquinone with potassium carbonate at 190℃ in NMP. Sulfonated poly(ether ether sulfone) (SPEES) derivative was prepared by sulfonating PEES쟈소 chlorosulfonic acid. The optimum conditions of the sulfonation of PEES, were obtained by ion exchange capacity. Reaction time was 3hr, reaction temp. 30℃ and dichlorosulfonic acid concentration was 150 mol%. Ion exchange capacities of PEES, which was sulfonated in optimum condition, was 6.1 meq/g. Also, Ion exchange capacity increased for solvent with strong polarity and high atom number. As PEES was sulfonated, glass temperature(T_g) increased and initial thermal degradation temperature decreased.

본 연구에서 poly(ether ether sulfone) (PEES)은 NMP 용매에 K₂ CO₃, dichlorophenyl sulfone과 hydroquinone을 넣고 190℃에서 합성되었다. Sulfonated poly(ether ether sulfone) (SPEES)는 PEES를 클로로황산으로 술폰화하였으며, 이온교환용량 값을 이용하여 술폰화의 최적 조건을 알아본 결과 반응시간 3시간, 반응온도 30℃, 클로로황산의 농도가 150 mol% 이었다. 최적조건으로 술폰화된 PEES의 이온교환용량은 6.1 meq/g이었다. 또한 이온교환용량은 용매의 극성이 증가할수록, 이온의 원자번호가 증가할수록 증가하였다. PEES가 술폰화됨에 따라 유리전이 온도 (T_g)는 증가하였고, 초기 열분해온도는 감소하였다.

Keywords: thermostable ion exchange resin; sulfonated poly(ether ether sulfone); poly(ether ether sulfone)