화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.11, No.6, 458-466, December, 2003
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Synthesis and Characterization of Sulfonated Polyimide Polymer Electrolyte Membranes
Hyoung-juhn Kim†, Morton H. Litt, Sang Yong Nam1, and Eun-mi Shin2
  • Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
  • 1Department of Polymer Science and Engineering, Engineering Research Institute, Gyeongsang National University, 900 Gazwa-dong, Chinju 660-701, Korea
  • 2Cable Research Lab., LG Cable Ltd., 555 Hogye-dong, Dongan-gu, Anyang-si, Gyunggi-do 431-080, Korea
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Several copolyimides have been synthesized with different combinations of comonomers in order to study the relationship between conductivity and water insolubility. m-Phenylenediamine (m-PDA), an angled comonomer, was introduced into the polymer backbone to increase water absorption, and resulted in higher proton conductivity. 2,2-bis(trifluoromethyl)benzidine (TFMB) was used as the comonomer to promote water insolubility. There is a good correlation between the water uptake and conductivity of the polyimides. The copolyimides that had high water uptake also generated high proton conductivity. Those polyimides had good mechanical properties. The copolyimides that have 27 mol% of TFMB and 9 mol% of m-PDA have reasonable conductivities and are insoluble in water at 90 ℃, even though they have lower conductivities than those of the homopolymer.
Keywords:sulfonic acid;polyimides;m-phenylenediamine;2,2-bis(trifluoromethyl)benzidine;proton conductivity;water insolubility.
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