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مقاله Manufacturing of polypropylene/silica nanocomposites using inدرsitu polymerization and investigation of product properties فایل ورد (word) دارای 4 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

فایل ورد مقاله Manufacturing of polypropylene/silica nanocomposites using inدرsitu polymerization and investigation of product properties فایل ورد (word) کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

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توجه : در صورت  مشاهده  بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Manufacturing of polypropylene/silica nanocomposites using inدرsitu polymerization and investigation of product properties فایل ورد (word) ،به هیچ وجه بهم ریختگی وجود ندارد

بخشی از متن مقاله Manufacturing of polypropylene/silica nanocomposites using inدرsitu polymerization and investigation of product properties فایل ورد (word) :

سال انتشار: 1390

محل انتشار: کنفرانس بین المللی فرآورش پلیمرها

تعداد صفحات: 4

چکیده:

In this research polypropylene/silica nanocomposites with different concentrations of fumed silica were prepared via in situ polymerization method using bi-supported Ziegler-Natta catalyst and their properties was investigated. Fumed silica and magnesium ethoxide were used as supports of TiCl4. Preparation of catalyst and polymerization process have been done in slurry phase and under argon atmosphere using triisobutylaluminum as the cocatalyst. Scanning Electron Microscopy (SEM) images also certified very good dispersion of fumed silica throughout PP matrix. The crystalline structures of prepared nanocomposites were characterized by differential scanning calorimetry (DSC). Thermogravimetric analysis (TGA) was used to characterize the thermal properties. Structural study was carried out using FTIR and GPC techniques. Meanwhile, the rheological tests of samples have been taken.In addition to tests for describe nanocomposites’s properties, effect of different factor e.g polymerization time, monomer pressure and [Al]/[Ti] were studied. Moreover, prepared nanocomposites in this method have superior thermal and morphological properties in comparison with those of similar nanocomposites prepared with other methods

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