کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7825307 1502924 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size-characterization of natural and synthetic polyisoprenes by Taylor dispersion analysis
ترجمه فارسی عنوان
اندازه گیری پلی استایرن های طبیعی و مصنوعی با استفاده از تجزیه پراکندگی تیلور
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Non-aqueous Taylor dispersion analysis (TDA) was used for the size-characterization of natural and synthetic polyisoprenes (4 × 103-2 × 106 g/mol molar mass). Not only the weight-average hydrodynamic radius (Rh), but also the probability distribution of the hydrodynamic radius, were both derived from the Taylorgrams by a simple integration of the elution profile and by a more sophisticated constrained regularized linear inversion of the Taylorgram, respectively. Results in terms of size characterization (hydrodynamic radii between 2 and 100 nm) were compared to size exclusion chromatography coupled to a refractive index-based mass detector. Multimodal size distributions were resolved by TDA for industrial and natural polyisoprenes, with the advantage over the chromatographic technique that, in TDA, there is no abnormal elution of microaggregates (hydrodynamic radii ∼ 40-50 nm). Considering the importance and the difficulty of characterizing polyisoprene microaggregates, TDA appears as a promising and simple technique for the characterization of synthetic and natural rubber.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 66, April 2018, Pages 244-250
نویسندگان
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