کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
52045 46863 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of LLDPE/alumina nanocomposites synthesized by insitu polymerization with zirconocene/d-MMAO catalyst
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Study of LLDPE/alumina nanocomposites synthesized by insitu polymerization with zirconocene/d-MMAO catalyst
چکیده انگلیسی

The LLDPE/Al2O3 nanocomposites synthesized by the insitu polymerization with dried-modified methylaluminoxane (d-MMAO)/zirconocene catalyst were investigated. First, after vacuum heated the Al2O3 nanofiller, the d-MMAO as the cocatalyst was impregnated onto it. Then, ethylene/1-hexene copolymerization was carried out with the presence of different amounts of d-MMAO/Al2O3 in a 100 mL semi-batch stainless steel autoclave reactor. After filtration, the obtained LLDPE nanocomposite was characterized by means of scanning electron microscopy (SEM)/energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR). It was found that the polymerization activity strongly depended on the [Al]dMMAO/[Zr]cat ratios. The addition of Al2O3 nanofiller apparently resulted in increased melting temperature and molecular weight of LLDPE without any change in molecular weight distribution (MWD).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 9, Issue 4, 15 March 2008, Pages 522–528
نویسندگان
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