کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1271537 | 1497563 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Soluble sulfonated polybenzothiazoles derived from 3,3′-disulfonate-4,4′-dicarboxylbiphenyl for proton exchange membranes Soluble sulfonated polybenzothiazoles derived from 3,3′-disulfonate-4,4′-dicarboxylbiphenyl for proton exchange membranes](/preview/png/1271537.png)
Two series of sulfonated polybenzothiazoles were synthesized by polycondensation of 2,5-diamino-1,4-benzenedithiol dihydrochloride and 3,3′-disulfonate-4,4′-dicarboxylbiphenyl with 4,4′-dicarboxylbiphenyl or 2,2-bis(4-carboxyphenyl) hexafluoropropane, which were termed as sPBT-DP and sPBT-BP, respectively. The first series is insoluble in common polar solvents because of its rigid structure. In contrast, the sPBT-BP series are soluble in DMSO and NMP, due to the flexible hexafluoroisopropylidene moieties in the backbone. Thus they could be cast into homogeneous membrane and evaluated as proton exchange membranes. The studies illustrated that they showed high thermal and oxidative stability as well as excellent mechanical properties. Moreover, they exhibited high proton conductivity and outstanding dimensional stability. For example, sPBT-BP57.5 displayed a proton conductivity of 0.094 S/cm and an in-plane swelling of 9.7% as well as a through-plane swelling of 35% at 80 °C. The sPBT-BP ionomers are a promising material for proton exchange membranes.
► Soluble sulfonated polybenzothiazoles with high molecular weight were achieved.
► The flexible hexafluoroisopropylidene moieties improved the solubility of products.
► These sulfonated polybenzothiazoles are a promising material for proton exchange membrane.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 6, March 2012, Pages 5170–5179