Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts
In this study, the synthesis of polyethylenes has been carried out with titanium-magnesium supported Ziegler-Natta catalysts in laboratory-scale reactors. A correlation of different polymerization conditions with thermal and mechanical properties of polyethylenes has been established. It is seen tha...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2014/549031 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832555907537436672 |
|---|---|
| author | M. Anwar Parvez Mostafizur Rahaman M. A. Suleiman J. B. P. Soares I. A. Hussein |
| author_facet | M. Anwar Parvez Mostafizur Rahaman M. A. Suleiman J. B. P. Soares I. A. Hussein |
| author_sort | M. Anwar Parvez |
| collection | DOAJ |
| description | In this study, the synthesis of polyethylenes has been carried out with titanium-magnesium supported Ziegler-Natta catalysts in laboratory-scale reactors. A correlation of different polymerization conditions with thermal and mechanical properties of polyethylenes has been established. It is seen that there is lowering of molecular weight (Mw), polymer yield, and catalyst activity at high hydrogen pressure and high temperature. The Mw, polymer yield, and catalyst activity are improved with the increase in ethylene pressure. Dynamic mechanical analysis (DMA) results show that the increase in temperature and hydrogen pressure decreases storage modulus. The samples with higher Mw showed high activation energy. The melting point decreases with the increase in hydrogen pressure but increases slightly with the increase in ethylene pressure. It is seen that the increase in reaction temperature, ethylene pressure, and hydrogen pressure leads to an increase in crystallinity. The tensile modulus increases with the increase in hydrogen pressure and can be correlated with the crystallinity of polymer. The Mw has a major influence on the flow activation energy and tensile strength. But the other mechanical and thermal properties depend on Mw as well as other parameters. |
| format | Article |
| id | doaj-art-1d662d9aa7bb44208d2a0221f3d4c431 |
| institution | Kabale University |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-1d662d9aa7bb44208d2a0221f3d4c4312025-02-03T05:46:50ZengWileyInternational Journal of Polymer Science1687-94221687-94302014-01-01201410.1155/2014/549031549031Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta CatalystsM. Anwar Parvez0Mostafizur Rahaman1M. A. Suleiman2J. B. P. Soares3I. A. Hussein4Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaDepartment of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaDepartment of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaDepartment of Chemical Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, CanadaDepartment of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi ArabiaIn this study, the synthesis of polyethylenes has been carried out with titanium-magnesium supported Ziegler-Natta catalysts in laboratory-scale reactors. A correlation of different polymerization conditions with thermal and mechanical properties of polyethylenes has been established. It is seen that there is lowering of molecular weight (Mw), polymer yield, and catalyst activity at high hydrogen pressure and high temperature. The Mw, polymer yield, and catalyst activity are improved with the increase in ethylene pressure. Dynamic mechanical analysis (DMA) results show that the increase in temperature and hydrogen pressure decreases storage modulus. The samples with higher Mw showed high activation energy. The melting point decreases with the increase in hydrogen pressure but increases slightly with the increase in ethylene pressure. It is seen that the increase in reaction temperature, ethylene pressure, and hydrogen pressure leads to an increase in crystallinity. The tensile modulus increases with the increase in hydrogen pressure and can be correlated with the crystallinity of polymer. The Mw has a major influence on the flow activation energy and tensile strength. But the other mechanical and thermal properties depend on Mw as well as other parameters.http://dx.doi.org/10.1155/2014/549031 |
| spellingShingle | M. Anwar Parvez Mostafizur Rahaman M. A. Suleiman J. B. P. Soares I. A. Hussein Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts International Journal of Polymer Science |
| title | Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts |
| title_full | Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts |
| title_fullStr | Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts |
| title_full_unstemmed | Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts |
| title_short | Correlation of Polymerization Conditions with Thermal and Mechanical Properties of Polyethylenes Made with Ziegler-Natta Catalysts |
| title_sort | correlation of polymerization conditions with thermal and mechanical properties of polyethylenes made with ziegler natta catalysts |
| url | http://dx.doi.org/10.1155/2014/549031 |
| work_keys_str_mv | AT manwarparvez correlationofpolymerizationconditionswiththermalandmechanicalpropertiesofpolyethylenesmadewithzieglernattacatalysts AT mostafizurrahaman correlationofpolymerizationconditionswiththermalandmechanicalpropertiesofpolyethylenesmadewithzieglernattacatalysts AT masuleiman correlationofpolymerizationconditionswiththermalandmechanicalpropertiesofpolyethylenesmadewithzieglernattacatalysts AT jbpsoares correlationofpolymerizationconditionswiththermalandmechanicalpropertiesofpolyethylenesmadewithzieglernattacatalysts AT iahussein correlationofpolymerizationconditionswiththermalandmechanicalpropertiesofpolyethylenesmadewithzieglernattacatalysts |