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dc.contributor.authorKamal, Muhammad Shahzad
dc.contributor.authorBahuleyan, Bijal Kottukkal
dc.contributor.authorSohail, Omer Bin
dc.contributor.authorEmwas, Abdul-Hamid M.
dc.contributor.authorBercaw, John E.
dc.contributor.authorAl-Harthi, Mamdouh Ahmed
dc.date.accessioned2015-08-03T11:10:54Z
dc.date.available2015-08-03T11:10:54Z
dc.date.issued2013-06-06
dc.identifier.issn01700839
dc.identifier.doi10.1007/s00289-013-0980-6
dc.identifier.urihttp://hdl.handle.net/10754/562805
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.
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.
dc.publisherSpringer Nature
dc.subjectCopolymerization
dc.subjectCRYSTAF
dc.subjectCrystallinity
dc.subjectMetallocene
dc.subjectPolyethylene
dc.subjectStyrene
dc.titleCrystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalysts
dc.typeArticle
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Lab
dc.identifier.journalPolymer Bulletin
dc.contributor.institutionDepartment of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
dc.contributor.institutionCenter of Research Excellence in Petroleum Refining and Petrochemicals, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
dc.contributor.institutionDepartment of Chemistry, Tokyo Metropolitan University Minami Osawa, Tokyo, Japan
dc.contributor.institutionArnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, CA, United States
kaust.personEmwas, Abdul-Hamid M.
dc.date.published-online2013-06-06
dc.date.published-print2013-09


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