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HERO ID
3480068
Reference Type
Journal Article
Title
New penta-ether as the internal donor in the MgCl2-supported Ziegler-Natta catalysts for propylene polymerization
Author(s)
Zahedi, R; Taromi, FA; Mirjahanmardi, SH; Haghighi, MN; Jadidi, K; Jamjah, R
Year
2016
Is Peer Reviewed?
Yes
Journal
Chinese Journal of Polymer Science
ISSN:
0256-7679
EISSN:
1439-6203
Volume
34
Issue
3
Page Numbers
268-279
Language
English
DOI
10.1007/s10118-016-1751-2
Web of Science Id
WOS:000368021200002
URL
http://html.rhhz.net/cjps/html/20150388.htm
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Abstract
The penta-ether compound was synthesized by the reaction of di(trimethylolpropane) with sodium hydride as the strong base and methyl iodide as the alkyl halide. This compound was characterized by NMR, FTIR, and GC techniques. The MgCl2-supported titanium catalysts were incorporated with varying amounts of penta-ether compound as the internal donor and also the catalysts without the internal donor were synthesized. The synthesized catalysts and the conventional Ziegler- Natta catalyst were characterized. The titanium contents were determined by spectrophotometry, magnesium by complexometric titration and chloride by argentometric titration. The effects of the new internal donor on propylene polymerization with the prepared MgCl2-supported Ziegler-Natta catalysts were investigated and then these results were compared to the results obtained using the conventional diisobutyl phthalate-besed-Ziegler-Natta catalyst. The highest crystallinity degree, melting temperature, and isotacticity of polypropylene were obtained using the catalyst with a penta-ether/Mg molar ratio equal to 0.21.
Keywords
Williamson reaction; Internal donor; Ziegler-Natta catalyst; External donor; Propylene polymerization
Tags
IRIS
•
Diisobutyl Phthalate (DIBP) Final
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