SYNTHESIS OF HIGH ISOTACTIC AND HIGH MELT FLOW POLYPROPYLENE IN LIQUID PROPYLENE

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EMAMI MEHRSA; MEHTARANI R.; SADATI M.A.S.; HORMOZI F.

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Paper Information

Journal: Iranian Journal of Polymer Science and Technology Year:2007 | Volume:20 | Issue:3 (ISSUE NO. 89) Page(s): 221-226

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Information Journal Paper

Title

SYNTHESIS OF HIGH ISOTACTIC AND HIGH MELT FLOW POLYPROPYLENE IN LIQUID PROPYLENE

Author(s)

EMAMI MEHRSA | MEHTARANI R. | SADATI M.A.S. | HORMOZI F. | Issue Writer Certificate

Keywords

BULK POLYMERIZATIONQ4

POLYPROPYLENEQ3

ZIEGLER- NAFTA CATALYSTQ3

HIGH ISOTACTICQ3

HIGH MELT FLOWQ3

Abstract

This is a report on the study of HIGH MELT FLOW, highly isotactic POLYPROPYLENE homopolymer synthesized in liquid monomer using a fifth generation Ziegler-Natta catalytic system. At highest catalyst productivity, the response of the catalyst to hydrogen as chain transferring agent, is studied. Melt flow rate is controlled by hydrogen from 0.4 to 300 g/10min with changing the amount of hydrogen from 0 to 1400 ppm. Results show that the melt flow rate of homopolymer is increased linearly with increasing the amount of hydrogen in polymerization. The effect of external electron donor on catalyst productivity and stereoregularity of the final product has been studied. The external electron donor on the catalyst caused an increase in polymer isotacticity, but led to decrease in catalyst productivity and its response to hydrogen (i.e., requiring relatively more hydrogen for molecular weight control). This new generation of Z-N catalyst system containing 1, 3-diether as internal electron donor has the ability to produce very high MFR polymers (for thin wall parts) in combination with narrow molecular weight distribution. These reactor grades of POLYPROPYLENE have many advantages compared to visbroken (controlled rheology) grades such as lower cost and better processability. These resins can be used as homopolymer matrix in sequential polymerization to obtain impact copolymers (heterophasic copolymers).

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APA: Copy

EMAMI, MEHRSA, MEHTARANI, R., HORMOZI, F., & SADATI, M.A.S.. (2007). SYNTHESIS OF HIGH ISOTACTIC AND HIGH MELT FLOW POLYPROPYLENE IN LIQUID PROPYLENE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 20(3 (ISSUE NO. 89)), 221-226. SID. https://sid.ir/paper/6533/en

Vancouver: Copy

EMAMI MEHRSA, MEHTARANI R., HORMOZI F., SADATI M.A.S.. SYNTHESIS OF HIGH ISOTACTIC AND HIGH MELT FLOW POLYPROPYLENE IN LIQUID PROPYLENE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2007;20(3 (ISSUE NO. 89)):221-226. Available from: https://sid.ir/paper/6533/en

IEEE: Copy

MEHRSA EMAMI, R. MEHTARANI, F. HORMOZI, and M.A.S. SADATI, “SYNTHESIS OF HIGH ISOTACTIC AND HIGH MELT FLOW POLYPROPYLENE IN LIQUID PROPYLENE,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 20, no. 3 (ISSUE NO. 89), pp. 221–226, 2007, [Online]. Available: https://sid.ir/paper/6533/en

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