Abstract—This study presents the influence of triethylaluminium as cocatalyst, cyclohexylmethyldimethoxysilane as external electron donor, and interaction between these two factors on catalyst activity in propylene polymerization with a 4th generation Ziegler-Natta catalyst. The experiments were performed by a two factor factorial design (concentration of triethylaluminium and cyclohexylmethyldimethoxysilane) and the analysis of variance was used to evaluate the results by Minitab14 software. This experimental design enabled us to investigate the main effects or individual effects of each factor and determine whether the factors had interaction or not. It was found that triethylaluminium had significant effect on catalyst activity but cyclohexylmethyldimethoxysilane donor was not individually effective on catalyst activity.
Index Terms—Catalyst Activity, Cocatalyst, External Electron Donor, Design of Experiments.
Zahra Sekhavat Pour is with the faculty of chemistry, Tarbiat Moallem University, Iran, Tehran, Mofateh Ave. No. 49, Postal code: 1571914911;e-mail: zsekhavat@gmail.com).
Abbas Shockravi is with the faculty of chemistry, Tarbiat Moallem University, Iran, Tehran, Mofateh Ave. No. 49, Postal code: 1571914911(corresponding author: Tel: +98 (912) 2596174; Fax: +98 (21) 88820993;e-mail: abbas_shockravi@yahoo.co.uk).
Ali Sabzevari Zadeh is master of Industrial Engineering, Industrial Engineering Department, Shahed University, Tehran, Iran (e-mail:alisabzevary@gmail.com).
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Cite: Zahra Sekhavat Pour, Abbas Shockravi, and Ali Sabzevari Zadeh, "Investigation of Effective Factors on the 4th Generation Ziegler-Natta Catalyst Activity by Design of Experiments," International Journal of Chemical Engineering and Applications vol. 2, no. 4, pp. 238-242, 2011.
