کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5181136 | 1380954 | 2014 | 10 صفحه PDF | دانلود رایگان |
A new family of polymeric ionic liquids (PILs) based on alkyl and alkyl ether substituted ammoniums and perfluorinated sulfonimides (i.e., bis(fluorosulfonyl)imide (FSIâ), and bis(trifluoromethanesulfonyl)imide (TFSIâ)) have been synthesized by polymerization of the corresponding ionic liquid monomers (ILMs). Their structures and compositions have been characterized by 1H and 19F NMR, FTIR and viscosity-average molecular weight (Mv). The physicochemical properties of both the ILMs and the PILs have been studied in terms of thermal stability, phase transition, and ionic conductivity. All the prepared ILMs and PILs reveal excellent thermal stabilities to greater than 250 °C. The PILs containing alkyl ether side unit show significant decrease in glass transition temperature (Tg), the values of Tg of the alkyl ether based-PILs are all significantly lower by 10-77 °C in magnitude than those of the corresponding alkyl based ones. The ionic conductivity of alkyl ether based-PILs in the best case increases up to 4.0 Ã 10â6 S cmâ1 at 30 °C, and reaches 7.6 Ã 10â5 S cmâ1 at 60 °C, and outperform their ammonium counterparts with alkyl side chain that were synthesized as references.
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Journal: Polymer - Volume 55, Issue 16, 5 August 2014, Pages 3339-3348