(nBuCp)2ZrCl2-catalyzed Ethylene-4M1P Copolymerization: Copolymer Backbone Structure, Melt Behavior, and Crystallization

Handle URI:
http://hdl.handle.net/10754/593662
Title:
(nBuCp)2ZrCl2-catalyzed Ethylene-4M1P Copolymerization: Copolymer Backbone Structure, Melt Behavior, and Crystallization
Authors:
Atiqullah, Muhammad; Adamu, Sagir; Malaibari, Zuhair O.; Al-Harthi, Mamdouh A.; Emwas, Abdul-Hamid M.
Abstract:
The judicious design of methylaluminoxane (MAO) anions expands the scope for developing industrial metallocene catalysts. Therefore, the effects of MAO anion design on the backbone structure, melt behavior, and crystallization of ethylene−4-methyl-1-pentene (E−4M1P) copolymer were investigated. Ethylene was homopolymerized, as well as copolymerized with 4M1P, using (i) MAO anion A (unsupported [MAOCl2]−) premixed with dehydroxylated silica, (nBuCp)2ZrCl2, and Me2SiCl2; and (ii) MAO anion B (Si−O−Me2Si−[MAOCl2]−) supported with (nBuCp)2ZrCl2 on Me2SiCl2-functionalized silica. Unsupported Me2SiCl2, opposite to the supported analogue, acted as a co-chain transfer agent with 4M1P. The modeling of polyethylene melting and crystallization kinetics, including critical crystallite stability, produced insightful results. This study especially illustrates how branched polyethylene can be prepared from ethylene alone using particularly one metallocene-MAO ion pair, and how a compound, that functionalizes silica as well as terminates the chain, can synthesize ethylene−α-olefin copolymers with novel structures. Hence, it unfolds prospective future research niches in polyethyne systhesis. This article is protected by copyright. All rights reserved.
KAUST Department:
Nuclear Magnetic Resonance Core Lab
Citation:
(nBuCp)2ZrCl2-catalyzed Ethylene-4M1P Copolymerization: Copolymer Backbone Structure, Melt Behavior, and Crystallization 2016:n/a AIChE Journal
Publisher:
Wiley-Blackwell
Journal:
AIChE Journal
Issue Date:
8-Jan-2016
DOI:
10.1002/aic.15159
Type:
Article
ISSN:
00011541
Additional Links:
http://doi.wiley.com/10.1002/aic.15159
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorAtiqullah, Muhammaden
dc.contributor.authorAdamu, Sagiren
dc.contributor.authorMalaibari, Zuhair O.en
dc.contributor.authorAl-Harthi, Mamdouh A.en
dc.contributor.authorEmwas, Abdul-Hamid M.en
dc.date.accessioned2016-01-18T07:56:42Zen
dc.date.available2016-01-18T07:56:42Zen
dc.date.issued2016-01-08en
dc.identifier.citation(nBuCp)2ZrCl2-catalyzed Ethylene-4M1P Copolymerization: Copolymer Backbone Structure, Melt Behavior, and Crystallization 2016:n/a AIChE Journalen
dc.identifier.issn00011541en
dc.identifier.doi10.1002/aic.15159en
dc.identifier.urihttp://hdl.handle.net/10754/593662en
dc.description.abstractThe judicious design of methylaluminoxane (MAO) anions expands the scope for developing industrial metallocene catalysts. Therefore, the effects of MAO anion design on the backbone structure, melt behavior, and crystallization of ethylene−4-methyl-1-pentene (E−4M1P) copolymer were investigated. Ethylene was homopolymerized, as well as copolymerized with 4M1P, using (i) MAO anion A (unsupported [MAOCl2]−) premixed with dehydroxylated silica, (nBuCp)2ZrCl2, and Me2SiCl2; and (ii) MAO anion B (Si−O−Me2Si−[MAOCl2]−) supported with (nBuCp)2ZrCl2 on Me2SiCl2-functionalized silica. Unsupported Me2SiCl2, opposite to the supported analogue, acted as a co-chain transfer agent with 4M1P. The modeling of polyethylene melting and crystallization kinetics, including critical crystallite stability, produced insightful results. This study especially illustrates how branched polyethylene can be prepared from ethylene alone using particularly one metallocene-MAO ion pair, and how a compound, that functionalizes silica as well as terminates the chain, can synthesize ethylene−α-olefin copolymers with novel structures. Hence, it unfolds prospective future research niches in polyethyne systhesis. This article is protected by copyright. All rights reserved.en
dc.language.isoenen
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://doi.wiley.com/10.1002/aic.15159en
dc.rightsThis is the peer reviewed version of the following article: Atiqullah, M., Adamu, S., Malaibari, Z. O., Al-Harthi, M. A. and Emwas, A.-H. M. (2016), (nBuCp)2ZrCl2-catalyzed Ethylene-4M1P Copolymerization: Copolymer Backbone Structure, Melt Behavior, and Crystallization. AIChE J.. Accepted Author Manuscript. doi:10.1002/aic.15159, which has been published in final form at http://doi.wiley.com/10.1002/aic.15159. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.en
dc.title(nBuCp)2ZrCl2-catalyzed Ethylene-4M1P Copolymerization: Copolymer Backbone Structure, Melt Behavior, and Crystallizationen
dc.typeArticleen
dc.contributor.departmentNuclear Magnetic Resonance Core Laben
dc.identifier.journalAIChE Journalen
dc.eprint.versionPost-printen
dc.contributor.institutionCenter for Refining and Petrochemicals, Research Institute, King Fahd University of Petroleum & Minerals; Dhahran 31261 Saudi Arabiaen
dc.contributor.institutionDepartment of Chemical Engineering; King Fahd University of Petroleum & Minerals; Dhahran 31261 Saudi Arabiaen
dc.contributor.institutionDepartment of Chemical Engineering; King Fahd University of Petroleum & Minerals; Dhahran 31261 Saudi Arabiaen
dc.contributor.institutionDepartment of Chemical Engineering; King Fahd University of Petroleum & Minerals; Dhahran 31261 Saudi Arabiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorEmwas, Abdul-Hamid M.en
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