کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5190223 | 1381201 | 2006 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Copolymerization behavior of Cp2ZrCl2/MAO and [(CO)5WC(Me)OZrCp2Cl]/MAO: a comparative study on ethylene/1-pentene copolymers
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ethylene/1-pentene copolymers were synthesized using Cp2ZrCl2(1)/MAO and [(CO)5WC(Me)OZr(Cp)2Cl](2)/MAO catalyst systems. The copolymers were characterized by SEC, DSC, FTIR and 13C NMR spectroscopy. The copolymers synthesized with [(CO)5WC(Me)OZr(Cp)2Cl](2)/MAO had higher average molecular weights and broader polydispersities compared to those produced with Cp2ZrCl2(1)/MAO. The chemical heterogeneity was investigated by SEC-FTIR and fractionation techniques. All copolymers showed a higher incorporation of the 1-pentene in the low molecular weight fraction as revealed by SEC-FTIR. Crystallization analysis fractionation (CRYSTAF) showed a broad chemical composition distribution (CCD) for all the copolymers synthesized with these two catalyst systems. Selected copolymers were also analyzed using an automated preparative molecular weight fractionation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 1, 3 January 2006, Pages 56-66
Journal: Polymer - Volume 47, Issue 1, 3 January 2006, Pages 56-66
نویسندگان
Nyambeni Luruli, Lars-Christian Heinz, Valérie Grumel, Robert Brüll, Harald Pasch, Helgard G. Raubenheimer,