پژوهشگاه پلیمر و پتروشیمی ایران با همکاری انجمن پلیمر ایران مجله علوم و تکنولوژی پلیمر 10163255 23 5 2010 12 22 Synthesis of (Ind)2ZrCl2 Catalyst for Copolymerization of Ethylene and Propylene: Parameters Effect on Productivity ساخت کاتالیزور بیس ایندنیل زیرکونیم دی کلرید برای کوپلیمرشدن اتیلن و پروپیلن و بررسی اثر عوامل مختلف بر مقدار محصول‌دهی 379 386 676 10.22063/jipst.2010.676 FA سعید احمدجو 0000-0002-8536-115X حسن عربی مهدی نکومنش حقیقی غلامحسین ظهوری مهدی مرتضوی Journal Article 2013 02 20 Bis(indenyl)zirconium dichloride as a catalyst was synthesized using a modified method at the room temperature. Polymerization of ethylene and copolymerization of ethylene and propylene were carried out by this metallocene catalyst. Ethylene propylene (P/E) feed ratios of 0.25, 0.5, 1, and 2 were employed into the copolymerization systems. Copolymerization conditions like cocatalyst/catalyst ratio, copolymerization temperature, feed ratio and the viscosity average molecular weight (Mv) changing with copolymerization temperature were investigated. Higher ratio of [Al]/[Zr]=750:1 increased the activity of the catalyst. However, higher concentration of the cocatalyst slightly reduced the activity. Viscosity-average molecular weight of polymer decreased with high ratio of [Al]/[Zr]. The highest activity was obtained at 60oC. Increases in copolymerization temperature decreased the viscosity-average molecular weight and ethylene content of the polymeric products. Increases in propylene content of the feed ratio produced<br />amorphous polymers with products of increased glass transition temperatures.<br />Kinetic reaction displayed a decay type of reaction. http://jips.ippi.ac.ir/article_676_73e93e8f0482d72268e16eba269727d6.pdf