Crystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalysts

Handle URI:
http://hdl.handle.net/10754/562805
Title:
Crystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalysts
Authors:
Kamal, Muhammad Shahzad; Bahuleyan, Bijal Kottukkal; Sohail, Omer Bin; Emwas, Abdul-Hamid M.; Bercaw, John E.; Al-Harthi, Mamdouh Ahmed
Abstract:
Ethylene homo polymer and ethylene-styrene copolymers were synthesized using Cp2ZrCl2 (1)/methyl aluminoxane (MAO) and rac-silylene-bis (indenyl) zirconium dichloride (2)/MAO catalyst systems by varying styrene concentration and reaction conditions. Crystallization analysis fractionation (CRYSTAF), DSC, FTIR and 1H NMR spectroscopy were used for characterizing the synthesized polymers. Interestingly, styrene was able to increase the activity of 1/MAO and 2/MAO catalyst systems at low concentrations, but at higher concentrations the activity decreases. The 1/MAO system at low and high pressure was unable to incorporate styrene, and the final product was pure polyethylene. On the other hand, with 2/MAO polymerization of ethylene and styrene yielded copolymer containing both styrene and ethylene. Results obtained from CRYSTAF and DSC reveal that on using 1/MAO system at high pressure, the resulting polymer in the presence of styrene has similar crystallinity as the polymer produced without styrene. Using both 1/MAO at low pressure and 2/MAO leads to decrease in crystallinity with increase in styrene concentration, even though the former does not incorporate styrene. © 2013 Springer-Verlag Berlin Heidelberg.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab
Publisher:
Springer Nature
Journal:
Polymer Bulletin
Issue Date:
6-Jun-2013
DOI:
10.1007/s00289-013-0980-6
Type:
Article
ISSN:
01700839
Sponsors:
Authors are thankful to Center of Research Excellence in Petroleum Refining and Petrochemicals, King Fahd University of Petroleum and Minerals and to King Abdulaziz City for Science and Technology (KACST) for project funds.
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorKamal, Muhammad Shahzaden
dc.contributor.authorBahuleyan, Bijal Kottukkalen
dc.contributor.authorSohail, Omer Binen
dc.contributor.authorEmwas, Abdul-Hamid M.en
dc.contributor.authorBercaw, John E.en
dc.contributor.authorAl-Harthi, Mamdouh Ahmeden
dc.date.accessioned2015-08-03T11:10:54Zen
dc.date.available2015-08-03T11:10:54Zen
dc.date.issued2013-06-06en
dc.identifier.issn01700839en
dc.identifier.doi10.1007/s00289-013-0980-6en
dc.identifier.urihttp://hdl.handle.net/10754/562805en
dc.description.abstractEthylene homo polymer and ethylene-styrene copolymers were synthesized using Cp2ZrCl2 (1)/methyl aluminoxane (MAO) and rac-silylene-bis (indenyl) zirconium dichloride (2)/MAO catalyst systems by varying styrene concentration and reaction conditions. Crystallization analysis fractionation (CRYSTAF), DSC, FTIR and 1H NMR spectroscopy were used for characterizing the synthesized polymers. Interestingly, styrene was able to increase the activity of 1/MAO and 2/MAO catalyst systems at low concentrations, but at higher concentrations the activity decreases. The 1/MAO system at low and high pressure was unable to incorporate styrene, and the final product was pure polyethylene. On the other hand, with 2/MAO polymerization of ethylene and styrene yielded copolymer containing both styrene and ethylene. Results obtained from CRYSTAF and DSC reveal that on using 1/MAO system at high pressure, the resulting polymer in the presence of styrene has similar crystallinity as the polymer produced without styrene. Using both 1/MAO at low pressure and 2/MAO leads to decrease in crystallinity with increase in styrene concentration, even though the former does not incorporate styrene. © 2013 Springer-Verlag Berlin Heidelberg.en
dc.description.sponsorshipAuthors are thankful to Center of Research Excellence in Petroleum Refining and Petrochemicals, King Fahd University of Petroleum and Minerals and to King Abdulaziz City for Science and Technology (KACST) for project funds.en
dc.publisherSpringer Natureen
dc.subjectCopolymerizationen
dc.subjectCRYSTAFen
dc.subjectCrystallinityen
dc.subjectMetalloceneen
dc.subjectPolyethyleneen
dc.subjectStyreneen
dc.titleCrystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalystsen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.identifier.journalPolymer Bulletinen
dc.contributor.institutionDepartment of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabiaen
dc.contributor.institutionCenter of Research Excellence in Petroleum Refining and Petrochemicals, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabiaen
dc.contributor.institutionDepartment of Chemistry, Tokyo Metropolitan University Minami Osawa, Tokyo, Japanen
dc.contributor.institutionArnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, CA, United Statesen
kaust.authorEmwas, Abdul-Hamid M.en
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