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A novel functional poly(propylene oxide)-backboned diamine of M w 400 (abbreviated as D400) was grafted with sulfonic acid (abbreviated as D400-PS) to improve the performance of Nafion ® membranes in direct methanol fuel cells (DMFCs). The interaction of the D400-PS with Nafion ® was studied by Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry...
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