Vinyl-addition type norbornene copolymer containing sulfonated biphenyl pendant groups for proton exchange membranes
Chen, Lie; Wang, X; He, X; Liu, S; Chen, Y; Zhou, W
| HERO ID | 1445958 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Vinyl-addition type norbornene copolymer containing sulfonated biphenyl pendant groups for proton exchange membranes |
| Authors | Chen, Lie; Wang, X; He, X; Liu, S; Chen, Y; Zhou, W |
| Journal | Journal of Applied Polymer Science |
| Volume | 127 |
| Issue | 3 |
| Page Numbers | 2280-2289 |
| Abstract | The vinyl addition type copolymer poly(butoxymethylene norbornene-co-biphenyl oxyhexamethyleneoxymethylene norbornene) (P(BN/BphN)) was synthesized by using bis-(beta-ketonaphthylimino)nickel(II)/B(C6F5)(3) catalytic system. P(BN/BphN) was sulfonated to give sulfonated P(BN/BphN) (SP(BN/BphN)) with concentrated sulfuric acid (98%) as sulfonating agent in a component solvent. The ion exchange capacity (IEC), degree of sulfonation (DS), water uptake, and methanol permeability of the SP(BN/BphN)s were increased with the sulfonated time. The methanol permeability of the SP(BN/BphN) membranes was in the range of 1.8 x 10(-7) to 7.5 x 10(-7) cm(2)/s, which were lower than the value 1.3 x 10(-6) cm(2)/s of Nafion (R) 115. The proton conductivity of SP(BN/BphN) membranes increased with the increase of IEC values, temperature, and water uptake. Water uptake of the SP(BN/BphN) membranes was lower than that of Nafion (R) 115 and leads to low proton conduction. Microscopic phase separation occurred in SP(BN/BphN) membrane and domains containing sulfonic acid groups were investigated by SEM and TEM. SP(BN/BphN) membranes had good mechanical properties, high thermal stability, and excellent oxidative stability. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
| Doi | 10.1002/app.37642 |
| Wosid | WOS:000310603100103 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000310603100103 |
| Is Public | Yes |
| Keyword | fuel cell; proton exchange membrane; proton conductivity; methanol permeability; transmission electron microscopy |