کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
227464 | 464823 | 2012 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Observation on inhibition of Ti3+ reduction by fumed silica addition in Ziegler-Natta catalyst with in situ ESR
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
This study focused on elucidation of effect of fumed silica added in the commercial Ziegler-Natta catalysts by physical solid–solid stirring. The added fumed silica seemed to cover around the catalyst revealed by SEM-EDX and apparently resulted in decreased activity of ethylene polymerization, but increased molecular weight of polyethylene as measured by GPC. Based on the in situ ESR measurement, it can be concluded that fumed silica can inhibit the reduction of Ti3+ by triethylaluminum (TEA). It is suggested that the delay reduction of Ti3+ may be beneficial for propylene polymerization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 18, Issue 6, 25 November 2012, Pages 1888–1892
Journal: Journal of Industrial and Engineering Chemistry - Volume 18, Issue 6, 25 November 2012, Pages 1888–1892
نویسندگان
Jirawat Pinyocheep, Sirachaya Kunjara Na Ayudhya, Bunjerd Jongsomjit, Piyasan Praserthdam,