کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1443518 1509465 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
GPC characterization of emeraldine base in NMP containing ionic liquids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
GPC characterization of emeraldine base in NMP containing ionic liquids
چکیده انگلیسی

Strong aggregation between chains of polyaniline (PANI) emeraldine base (EB) molecules dissolved/dispersed in N-methyl-2-pyrrolidinone (NMP) results in a multi-modal molecular weight distribution in gel permeation chromatograph (GPC) results, regardless of how low the concentration of EB is. The addition of a salt, such as lithium chloride (LiCl), is known to improve EB solubility in NMP by deaggregating the polymer chains. However, we have found that ionic liquids, such as 1-methyl-3-butyl imidazolium tetrafluoroborate ([BMIM][BF4]) or 1-methyl-3-ethyl imidazolium tetrafluoroborate ([EMIM][BF4]), not only have less impact on the EB chain conformation than LiCl does, but also deaggregate the EB molecules more effectively. A mono-distributed GPC peak is obtained for EB (Mw up to 3 × 105 g/mol) dissolved in the NMP/ionic liquid solutions. Therefore, the EB molecular weight distribution is characterized more accurately by using the NMP/ionic liquid solution than the NMP/LiCl solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 157, Issues 22–23, November 2007, Pages 988–996
نویسندگان
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