کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5185224 | 1381071 | 2009 | 12 صفحه PDF | دانلود رایگان |
In this study, new anhydrous proton conducting polyelectrolytes were prepared based on sulfonated bisphenol A polyetherimide (SPEI) and 1H-1,2,4-triazole (Taz) as a solid state proton solvent. The effect of degree of sulfonation and triazole concentration on size, shape and dispersibility (crystal morphology) of triazole crystals in sulfonated polyetherimide were examined and correlated with proton conduction. At a constant triazole weight percent, increased sulfonation level caused enhanced nucleation density, reduction of crystallite size and their uniform distribution throughout SPEI matrix. The decrease in size was responsible for the depression of triazole melting temperature. Proton conduction through structure diffusion occurred effectively within the smaller size crystals due to the improved molecular mobility.
Journal: Polymer - Volume 50, Issue 4, 9 February 2009, Pages 1034-1045