کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5209865 | 1503080 | 2014 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of MALDI-ToF MS to elucidate the structure of oligomeric impurities formed during 'click' cyclization of polystyrene
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Use of MALDI-ToF MS to elucidate the structure of oligomeric impurities formed during 'click' cyclization of polystyrene Use of MALDI-ToF MS to elucidate the structure of oligomeric impurities formed during 'click' cyclization of polystyrene](/preview/png/5209865.png)
چکیده انگلیسی
Polymers with a cyclic topology exhibit a range of unique and potentially useful physical properties, including reduced rates of degradation and increased rates of diffusion in bulk relative to linear analogs. However, the synthesis of high purity cyclic polymers and verification of their structural purity remain challenging. The copper-catalyzed azide-alkyne “click” cyclization route toward cyclic polymers has been widely used, due to its synthetic ease and its compatibility with diverse polymer backbones. Yet unoptimized click cyclization conditions have been observed to generate oligomeric byproducts. In order to optimize these cyclization conditions, and to better understand the structure of the higher molecular weight oligomers, these impurities have been isolated and characterized. Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-ToF) MS is a particularly valuable characterization tool and was used to determine that the high molecular weight impurities are predominantly cyclic oligomers. It should also be noted that the rapid analysis and small analyte requirements of this MS technique make it particularly attractive as a general tool for elucidating polymer architecture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 80, July 2014, Pages 83-94
Journal: Reactive and Functional Polymers - Volume 80, July 2014, Pages 83-94
نویسندگان
Subramanya G. Sreerama, Ravinder Elupula, Boyd A. Laurent, Boyu Zhang, Scott M. Grayson,