Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization
The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization. A modified catalyst containing 10 wt. % of FeCl3 dopa...
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| Format: | Article |
| Language: | English |
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Iran Polymer and Petrochemical Institute
2017-06-01
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| Series: | Polyolefins Journal |
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| Online Access: | http://poj.ippi.ac.ir/article_1467_b56b4ccf7ae6315079bb07675ebe04fd.pdf |
| _version_ | 1819266032849649664 |
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| author | Farshid Nouri-Ahangarani Mehdi Nekoomanesh Seyed Amin Mirmohammadi Naeimeh Bahri-Laleh |
| author_facet | Farshid Nouri-Ahangarani Mehdi Nekoomanesh Seyed Amin Mirmohammadi Naeimeh Bahri-Laleh |
| author_sort | Farshid Nouri-Ahangarani |
| collection | DOAJ |
| description | The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization. A modified catalyst containing 10 wt. % of FeCl3 dopant demonstrated the highest activity, with 32% activity increase compared to unmodified one, among the series. The GPC results showed a lower molecular weight as well as broader MWD for the poly1-hexenes obtained from FeCl3-doped catalyst. The distribution of active centers was analyzed using deconvolution of the MW profiles with using multiple Flory functions. It was demonstrated that the number of active sites increased by 10 wt. % FeCl3 doping, however, by more increasing the dopant amount to 15 wt.%, the number of active sites decreased. The 13C-NMR results indicated that, FeCl3 doping did not have a considerable effect on the polymer tacticity (with total tacticity of 53 %), however it increased by donor presence to the maximum value of 60 %. |
| first_indexed | 2024-12-23T20:54:50Z |
| format | Article |
| id | doaj.art-3f514a568ef74500b1cc02edcd646a31 |
| institution | Directory Open Access Journal |
| issn | 2322-2212 2345-6868 |
| language | English |
| last_indexed | 2024-12-23T20:54:50Z |
| publishDate | 2017-06-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | Polyolefins Journal |
| spelling | doaj.art-3f514a568ef74500b1cc02edcd646a312022-12-21T17:31:34ZengIran Polymer and Petrochemical InstitutePolyolefins Journal2322-22122345-68682017-06-014225326210.22063/poj.2017.14671467Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerizationFarshid Nouri-Ahangarani0Mehdi Nekoomanesh1Seyed Amin Mirmohammadi2Naeimeh Bahri-Laleh3Polymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, IranPolymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, IranDepartment of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, IranPolymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, IranThe aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization. A modified catalyst containing 10 wt. % of FeCl3 dopant demonstrated the highest activity, with 32% activity increase compared to unmodified one, among the series. The GPC results showed a lower molecular weight as well as broader MWD for the poly1-hexenes obtained from FeCl3-doped catalyst. The distribution of active centers was analyzed using deconvolution of the MW profiles with using multiple Flory functions. It was demonstrated that the number of active sites increased by 10 wt. % FeCl3 doping, however, by more increasing the dopant amount to 15 wt.%, the number of active sites decreased. The 13C-NMR results indicated that, FeCl3 doping did not have a considerable effect on the polymer tacticity (with total tacticity of 53 %), however it increased by donor presence to the maximum value of 60 %.http://poj.ippi.ac.ir/article_1467_b56b4ccf7ae6315079bb07675ebe04fd.pdfZiegler-Natta catalysts1-hexene polymerizationpoly(α-olefin)tacticity |
| spellingShingle | Farshid Nouri-Ahangarani Mehdi Nekoomanesh Seyed Amin Mirmohammadi Naeimeh Bahri-Laleh Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization Polyolefins Journal Ziegler-Natta catalysts 1-hexene polymerization poly(α-olefin) tacticity |
| title | Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization |
| title_full | Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization |
| title_fullStr | Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization |
| title_full_unstemmed | Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization |
| title_short | Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization |
| title_sort | effects of fecl3 doping on the performance of mgcl2 ticl4 dnpb catalyst in 1 hexene polymerization |
| topic | Ziegler-Natta catalysts 1-hexene polymerization poly(α-olefin) tacticity |
| url | http://poj.ippi.ac.ir/article_1467_b56b4ccf7ae6315079bb07675ebe04fd.pdf |
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