Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen
Copolymerization of ethylene and propylene was investigated using a 4th generation phthalate Ziegler-Natta catalyst in normal hexane in a Buchi reactor. The effects of different mole fractions of [Al]/[Ti], [Si]/[Al] and various amounts of hydrogen on productivity and weight percent of ethylene on t...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | fas |
| Published: |
Iran Polymer and Petrochemical Institute
2007-08-01
|
| Series: | علوم و تکنولوژی پلیمر |
| Subjects: | |
| Online Access: | http://jips.ippi.ac.ir/article_805_b0488a82031c1639bdd1e45e9e5c9964.pdf |
| _version_ | 1819151748384686080 |
|---|---|
| author | R. Mehtarani H. Arabi M.B. Teymori S.S. Hosseini shiraz V. Eslami manesh |
| author_facet | R. Mehtarani H. Arabi M.B. Teymori S.S. Hosseini shiraz V. Eslami manesh |
| author_sort | R. Mehtarani |
| collection | DOAJ |
| description | Copolymerization of ethylene and propylene was investigated using a 4th generation phthalate Ziegler-Natta catalyst in normal hexane in a Buchi reactor. The effects of different mole fractions of [Al]/[Ti], [Si]/[Al] and various amounts of hydrogen on productivity and weight percent of ethylene on the product, were studied. In the copolymerization reactions, tri-isobutyl aluminum (TiBAl) was used as cocatalyst instead of triethyl aluminum (TEAl) because TiBAl produced a more amorphous copolymer. In molar ratio [TiBAl]/[Ti] = 480 the catalyst activity was at maximum and ethylene content in this ratio was at minimum. Cyclohexyl-methyldimethoxy silane was used as external donor. In molar ratio [Si]/[TiBAl] = 0.05, the copolymer showed more amorphous behavior. In this molar ratio, the external donor decreased the productivity of the catalyst and a further increase of external donor concentration increased the productivity. Hydrogen increased the productivity of the catalyst and decreased the ethylene content of the copolymer in low concentration. In high concentration, however, hydrogen decreased the productivity and increased the ethylene content of the copolymer. Hydrogen as a chain transfer agent decreased the viscosity average molecular weight. |
| first_indexed | 2024-12-22T14:38:20Z |
| format | Article |
| id | doaj.art-78c87191103d40a4ad21e110041ca6ac |
| institution | Directory Open Access Journal |
| issn | 1016-3255 2008-0883 |
| language | fas |
| last_indexed | 2024-12-22T14:38:20Z |
| publishDate | 2007-08-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | علوم و تکنولوژی پلیمر |
| spelling | doaj.art-78c87191103d40a4ad21e110041ca6ac2022-12-21T18:22:36ZfasIran Polymer and Petrochemical Instituteعلوم و تکنولوژی پلیمر1016-32552008-08832007-08-0120328128710.22063/jipst.2007.805805Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and HydrogenR. MehtaraniH. ArabiM.B. TeymoriS.S. Hosseini shirazV. Eslami maneshCopolymerization of ethylene and propylene was investigated using a 4th generation phthalate Ziegler-Natta catalyst in normal hexane in a Buchi reactor. The effects of different mole fractions of [Al]/[Ti], [Si]/[Al] and various amounts of hydrogen on productivity and weight percent of ethylene on the product, were studied. In the copolymerization reactions, tri-isobutyl aluminum (TiBAl) was used as cocatalyst instead of triethyl aluminum (TEAl) because TiBAl produced a more amorphous copolymer. In molar ratio [TiBAl]/[Ti] = 480 the catalyst activity was at maximum and ethylene content in this ratio was at minimum. Cyclohexyl-methyldimethoxy silane was used as external donor. In molar ratio [Si]/[TiBAl] = 0.05, the copolymer showed more amorphous behavior. In this molar ratio, the external donor decreased the productivity of the catalyst and a further increase of external donor concentration increased the productivity. Hydrogen increased the productivity of the catalyst and decreased the ethylene content of the copolymer in low concentration. In high concentration, however, hydrogen decreased the productivity and increased the ethylene content of the copolymer. Hydrogen as a chain transfer agent decreased the viscosity average molecular weight.http://jips.ippi.ac.ir/article_805_b0488a82031c1639bdd1e45e9e5c9964.pdfcopolymerizationziegler-natta catalystexternal electron donorslurry polymerizationcocatalyst |
| spellingShingle | R. Mehtarani H. Arabi M.B. Teymori S.S. Hosseini shiraz V. Eslami manesh Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen علوم و تکنولوژی پلیمر copolymerization ziegler-natta catalyst external electron donor slurry polymerization cocatalyst |
| title | Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen |
| title_full | Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen |
| title_fullStr | Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen |
| title_full_unstemmed | Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen |
| title_short | Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen |
| title_sort | copolymerization of ethylene and propylene using 4th generation ziegler natta catalyst influence of cocatalyst external electron donor and hydrogen |
| topic | copolymerization ziegler-natta catalyst external electron donor slurry polymerization cocatalyst |
| url | http://jips.ippi.ac.ir/article_805_b0488a82031c1639bdd1e45e9e5c9964.pdf |
| work_keys_str_mv | AT rmehtarani copolymerizationofethyleneandpropyleneusing4thgenerationzieglernattacatalystinfluenceofcocatalystexternalelectrondonorandhydrogen AT harabi copolymerizationofethyleneandpropyleneusing4thgenerationzieglernattacatalystinfluenceofcocatalystexternalelectrondonorandhydrogen AT mbteymori copolymerizationofethyleneandpropyleneusing4thgenerationzieglernattacatalystinfluenceofcocatalystexternalelectrondonorandhydrogen AT sshosseinishiraz copolymerizationofethyleneandpropyleneusing4thgenerationzieglernattacatalystinfluenceofcocatalystexternalelectrondonorandhydrogen AT veslamimanesh copolymerizationofethyleneandpropyleneusing4thgenerationzieglernattacatalystinfluenceofcocatalystexternalelectrondonorandhydrogen |