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Polyolefins Journal، جلد ۲، شماره ۲، صفحات ۷۳-۸۷
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عنوان انگلیسی Study of Ziegler-Natta/(2-PhInd)2ZrCl2 hybrid catalysts performance in slurry propylene polymerization
چکیده انگلیسی مقاله Several types of hybrid catalysts are made through mixing of 4th generation Ziegler-Natta (ZN) and (2-PhInd)2ZrCl2metallocene catalysts using triethylaluminum (TEA) as coupling agent. Response surface methodology (RSM)is used to evaluate the interactive effects of different parameters including amounts of metallocene and TEA andtemperature on metallocene loading. Analyzing the amounts of Al and Zr elements in the hybrid catalysts throughICP-OES and EDXA reveals that temperature plays a crucial role on anchoring of the metallocene catalyst on ZNwhile TEA has the least determining effect. The ICP analysis shows that as the concentration of Al goes up in thehybrid catalyst the concentration of Zr passes a maximum, while EDXA shows a direct relationship between the Aland Zr contents. Using triisobutylaluminum (TIBA) and methylaluminoxane (MAO) as the coupling agents, almostsimilar metallocene loadings are observed. Finally, the performance of hybrid catalysts is investigated in propylenepolymerization and the obtained polymers are characterized using DSC and DMTA through which the presence of twotypes of polymers in the final product are confirmed.
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نویسندگان مقاله غلامرضا نجابت | gholam reza
department of polymer engineering, school of chemical and material engineering, islamic azad university shiraz branch , p.o. box. 71993-3, shiraz, iran
سازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (Islamic azad university science and research branch)

مهدی نکومنش |
polymerization engineering department, iran polymer and petrochemical institute ippi , p.o. box 14965 115, tehran, iran

حسن عربی |
polymerization engineering department, iran polymer and petrochemical institute ippi , p.o. box 14965 115, tehran, iran

حمید صالحی مبارکه | salehi mobarakeh
petrochemical department, iran polymer and petrochemical institute ippi , p.o. box 14965 115, tehran, iran

غلامحسین ظهوری | gholam hossein
department of chemistry, faculty of science, ferdowsi university of mashhad, p.o. box 1436, mashhad, iran
سازمان اصلی تایید شده: دانشگاه فردوسی (Ferdowsi university)

محمد مهدی مرتضوی | mohammad mahdi
polymerization engineering department, iran polymer and petrochemical institute ippi , p.o. box 14965 115, tehran, iran

سعید احمدجو |
catalyst department, iran polymer and petrochemical institute ippi , p.o. box 14965 115, tehran, iran

استفن a میلر | stephen a
the george and josephine butler polymer research laboratory, department of chemistry, university of florida, gainesville, florida 32611-7200, usa

نشانی اینترنتی http://poj.ippi.ac.ir/article_1145_349.html
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