New penta-ether as the internal donor in the MgCl2-supported Ziegler-Natta catalysts for propylene polymerization
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- 作者：Roya Zahedi ; Faramarz Afshar Taromi…
- 关键词：Williamson reaction ; Internal donor ; Ziegler ; Natta catalyst ; External donor ; Propylene polymerization
- 刊名：Chinese Journal of Polymer Science
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：34
- 期：3
- 页码：268-279
- 全文大小：1,094 KB
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Faramarz Afshar Taromi (2)
Seyed Heidar Mirjahanmardi (3)
Mehdi Nekoomanesh Haghighi (4)
Khosrow Jadidi (5)
Roghayeh Jamjah (4)
1. Department of Chemistry, Amirkabir University of Technology, 15875-4413, Tehran, Iran
2. Department of Polymer Engineering, Amirkabir University of Technology, 15875-4413, Tehran, Iran
3. Department of Polymer Engineering, Amirkabir University of Technology-Mahshahr Campus, 63516-43659, Mahshahr, Iran
4. Iran Polymer and Petrochemical Institute (IPPI), 14977-13115, Tehran, Iran
5. Department of Chemistry, Shahid Beheshti University, 19839-69411, Tehran, Iran - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Condensed Matter Physics
Industrial Chemistry and Chemical Engineering
Polymer Sciences
Characterization and Evaluation of Materials - 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
- ISSN：1439-6203
文摘
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.