STRUCTURAL ANALYSIS OF ETHYLENE/PROPYLENE COPOLYMER SYNTHESIZED USING HIGH ACTIVITY BI-SUPPORTED ZIEGLER-NATTA CATALYST

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NEKOU MANESH M.; MORTAZAVI MOHAMMAD MAHDI; JAMJAH R.; AHMADJOU S.; ZOHOURI GH.H.

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Journal Paper

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Journal: Iranian Polymer Journal Year:2005 | Volume:14 | Issue:9 (63) Page(s): 793-798

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Title

STRUCTURAL ANALYSIS OF ETHYLENE/PROPYLENE COPOLYMER SYNTHESIZED USING HIGH ACTIVITY BI-SUPPORTED ZIEGLER-NATTA CATALYST

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Keywords

SANS-SERIF">CNMR

EPM

STRUCTURAL ANALYSIS

TRIAD DISTRIBUTION

ZIEGLER-NATTA CATALYST

Abstract

Slurry copolymerization of ethylene and propylene (EPM) was carried out in dry nheptane using high activity catalyst system of SiO2/MgCl2/TiCl4/EB/TiBA (or TEA)/MPT/H2. The structure of four EPM samples with ethylene content of 30%, 40%, 50% and 80% were analyzed using 13C NMR method. The complex spectra taking at high field are interpreted as resulting from ethylene propylene sequence placements. A methylene sequence distribution from one to six is given for four different ethylene propylene copolymer samples distribution. Increasing ethylene content of the copolymer increased EEE triad and decreased PPP TRIAD DISTRIBUTIONs. Due to higher activity of ethylene monomer increasing its content from 30% to 80% the EEE TRIAD DISTRIBUTION increased from 4.5% to about 73%. In the sample containing 30% of ethylene the PPP triad was less than 30% which is an indication of very high relative activity of ethylene to propylene for copolymerization using the catalyst system. The catalyst system used was quite active for the copolymerization and may introduce alternative sequence distribution in the polymer chain. Higher portion of propylene in the copolymer significantly increased the sequence of single methylene units and decreased six and more consecutive units. The EPM copolymer containing 30% to 50% ethylene have amorphous properties.

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APA: Copy

NEKOU MANESH, M., MORTAZAVI, MOHAMMAD MAHDI, JAMJAH, R., AHMADJOU, S., & ZOHOURI, GH.H.. (2005). STRUCTURAL ANALYSIS OF ETHYLENE/PROPYLENE COPOLYMER SYNTHESIZED USING HIGH ACTIVITY BI-SUPPORTED ZIEGLER-NATTA CATALYST. IRANIAN POLYMER JOURNAL (ENGLISH), 14(9 (63)), 793-798. SID. https://sid.ir/paper/530752/en

Vancouver: Copy

NEKOU MANESH M., MORTAZAVI MOHAMMAD MAHDI, JAMJAH R., AHMADJOU S., ZOHOURI GH.H.. STRUCTURAL ANALYSIS OF ETHYLENE/PROPYLENE COPOLYMER SYNTHESIZED USING HIGH ACTIVITY BI-SUPPORTED ZIEGLER-NATTA CATALYST. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2005;14(9 (63)):793-798. Available from: https://sid.ir/paper/530752/en

IEEE: Copy

M. NEKOU MANESH, MOHAMMAD MAHDI MORTAZAVI, R. JAMJAH, S. AHMADJOU, and GH.H. ZOHOURI, “STRUCTURAL ANALYSIS OF ETHYLENE/PROPYLENE COPOLYMER SYNTHESIZED USING HIGH ACTIVITY BI-SUPPORTED ZIEGLER-NATTA CATALYST,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 14, no. 9 (63), pp. 793–798, 2005, [Online]. Available: https://sid.ir/paper/530752/en

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