Synthesis and Characterization of Sulfonated Polyimide Polymer Electrolyte Membranes

  • Kim, Hyoung-juhn (Department of Macromolecular Science and Engineering, Case Western Reserve University) ;
  • Morton H. Litt (Department of Macromolecular Science and Engineering, Case Western Reserve University) ;
  • Nam, Sang-Yong (Department of Polymer Science and Engineering, Engineering Research Institute, Gyeonsang National University) ;
  • Shin, Eun-mi (Coble Research Lab., LG Cable Ltd.)
  • Published : 2003.12.01

Abstract

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$^{\circ}C$, even though they have lower conductivities than those of the homopolymer.

References

  1. Perfluorinated Ionomer Membranes R.S.Yeo;H.L.Yeager;A.Eisenberg(ed.);H.L.Yeager
  2. U.S. Paent 3,282,875 D.J.Connolly;W.F.Gresham
  3. Chem. Ing. Tech. v.50 W.Grot https://doi.org/10.1002/cite.330500415
  4. U.S. Patent 4,358,412 B.R.Ezzell;W.P.Carl;W.A.Mod
  5. J. Power Sources v.114 V.Mehta;J.S.Cooper https://doi.org/10.1016/S0378-7753(02)00542-6
  6. Prog. Polym. Sci. v.25 M.Rikukawa;K.Sanui https://doi.org/10.1016/S0079-6700(00)00032-0
  7. J. Membr. Sci. v.160 E.Vallejo;G.Pourcelly;C.Gavach;R.Mercier;M.Pineri https://doi.org/10.1016/S0376-7388(99)00070-8
  8. Polymer v.42 C.Genies;R.Mercier;B.Sillion;N>Cornet;G.Gebel;M.Pineri https://doi.org/10.1016/S0032-3861(00)00384-0
  9. Polym. Prepr. (Am. Chem. Soc. Div. Polym. Chem.) v.40 Y.Zhang;M.Litt;R.F.Savinell;J.S.Wainright
  10. Polyimides and High Performance Polymers, 5th European Technical Symposium on Polyimides and High Performance Functional Polymers Y.Zhang;M.Litt;H.Jiang;R.F.Savinell;J.S.Wainright
  11. J.Electrochem. Soc. v.140 B.D.Cahan;J.S.Wainright https://doi.org/10.1149/1.2221160
  12. M. S. Thesis Case Western Reserve University L.M.S.Chen
  13. Tensile tests were performed according to ASTM D882 using an Instron Series IX Automated Material Testing System Dumb-bell specimens were cut according to ASTM D638-V (size of rectangular test region on a dumb-bell specimen is 3mm × 9.5 mm, Width × length)
  14. J. Polym. Sci., Part A: Polym. Chem. v.35 D.Sek;A.Wanic;E.Schab-Balcerzak https://doi.org/10.1002/(SICI)1099-0518(199702)35:3<539::AID-POLA19>3.0.CO;2-P
  15. J.Polym. Sci., Part A: Polym. Chem. v.37 D.Sek;A.Wanic;H.Janeczek;M.J.M.Abadie https://doi.org/10.1002/(SICI)1099-0518(19990901)37:17<3523::AID-POLA10>3.0.CO;2-B
  16. Polymer v.41 D.Sek;A.Wanic https://doi.org/10.1016/S0032-3861(99)00427-9
  17. The Aldrich Library of FT-IR Spectra edition I v.3 C.Pouchert
  18. Ph.D. Thesis, Case Western Reserve University Zhang
  19. Macromol. Res. v.11 S.H.Park;K.J.Kim;W.W.So;S.J.Moon;S.B.Lee https://doi.org/10.1007/BF03218346
  20. Macromol. Res. v.10 J.C.Park;J.S.Kim;D.H.Jung https://doi.org/10.1007/BF03218303