کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7825206 | 1502923 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Morphological Raman analysis of short chain branched ethylene and propylene metallocenic copolymers
ترجمه فارسی عنوان
تجزیه و تحلیل ریفان مورفولوژیکی از کوپلیمر های اتیلن و پروپیلن متالوکنیک کوتاه زنجیره ای شاخه ای
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Spectroscopic features in the Raman spectra of semicrystalline polyolefins that characterize different phase morphologies are reported. With growing incorporation of different 1-olefins, changes in the spectra due to different short chain branches are identified for polyethylene and polypropylene, both isotactic and syndiotactic. Bands were assigned to crystalline, semicrystalline and amorphous contents, and quantification was approached with the use of internal reference bands. The degree of crystallinity and the conformational order of the copolymers decrease with the increase in short chain branches content, and the behavior of larger short chains is different depending on the type of polymer analyzed. A semi ordered interphase was found, assigned and followed in all cases, as well as the evolution of amorphous phase with comonomer incorporation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 67, May 2018, Pages 450-456
Journal: Polymer Testing - Volume 67, May 2018, Pages 450-456
نویسندگان
A.J. Satti, R. Quijada, J.M. Pastor, E.M. Vallés,