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% ofm-PDA have reasonable conductivities and are insoluble in water at 90 °C, even though they have lower conductivities than those of the homopolymer.
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References
R. S. Yeo, and H. L. Yeager, inPerfluorinated Ionomer Membranes, A. Eisenberg, and H. L. Yeager, Eds., ACS, Washington, 1980, pp 437–505.
D. J. Connolly and W. F. Gresham, U.S. Patent 3,282,875 (1966).
W. Grot,Chem. Ing. Tech.,50, 299 (1978).
B. R. Ezzell, W. P. Carl, and W. A. Mod, U.S. Patent 4,358,412 (1982).
V. Mehta and J. S. Cooper,J. Power Sources,114, 32 (2003).
M. Rikukawa and K. Sanui,Prog. Polym. Sci.,25, 1463 (2000).
E. Vallejo, G. Pourcelly, C. Gavach, R. Mercier, and M. Pineri,J. Membr. Sci.,160, 127 (1999). (b) C. Genies, R. Mercier, B. Sillion, N. Cornet, G. Gebel, and M. Pineri,Polymer,42, 359 (2001).
Y. Zhang, M. Litt, R. F. Savinell, and J. S. Wainright,Polym. Prepr. (Am. Chem. Soc. Div. Polym. Chem.),40, 480 (1999).
Y. Zhang, M. Litt, H. Jiang, R. F. Savinell, and J. S. Wainright, inPolyimides and High Performance Polymers, 5th European Technical Symposium on Polyimides and High Performance Functional Polymers, University Montpellier 2, France, 3–5 May, 1999, pp 268–8274.
B. D. Cahan and J. S. Wainright,J. Electrochem. Soc.,140, L185 (1993).
L. M. S. Chen and M. S. Thesis, Case Western Reserve University, Ohio, USA (2000).
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 3 mm × 9.5 mm, width × length).
D. Sek, A. Wanic, and E. Schab-Balcerzak,J. Polym. Sci., Part A: Polym. Chem.,35, 539 (1997). (b) D. Sek, A. Wanic, H. Janeczek, and M. J. M. Abadie,J. Polym. Sci., Part A: Polym. Chem.,37, 3523 (1999). (c) D. Sek and A. Wanic,Polymer,41, 2367 (2000).
C. Pouchert,The Aldrich Library of FT-IR Spectra edition I,3, 16690 (1985).
Zhang, Ph.D. Thesis, Case Western Reserve University, Ohio, USA (2001).
S. H. Park, K. J. Kim, W. W. So, S. J. Moon, and S. B. Lee,Macromol. Res.,11, 157 (2003)
J. C. Park, J. S. Kim, and D. H. Jung,Macromol. Res.,10, 181 (2002).
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Kim, Hj., Litt, M.H., Nam, S.Y. et al. Synthesis and characterization of sulfonated polyimide polymer electrolyte membranes. Macromol. Res. 11, 458–466 (2003). https://doi.org/10.1007/BF03218976
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DOI: https://doi.org/10.1007/BF03218976