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

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    Type
    Article
    Authors
    Kamal, Muhammad Shahzad
    Bahuleyan, Bijal Kottukkal
    Sohail, Omer Bin
    Emwas, Abdul-Hamid M.
    Bercaw, John E.
    Al-Harthi, Mamdouh Ahmed
    KAUST Department
    Imaging and Characterization Core Lab
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Date
    2013-06-06
    Online Publication Date
    2013-06-06
    Print Publication Date
    2013-09
    Permanent link to this record
    http://hdl.handle.net/10754/562805
    
    Metadata
    Show full item record
    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.
    Citation
    Kamal, M. S., Bahuleyan, B. K., Sohail, O. B., Emwas, A.-H. M., Bercaw, J. E., & Al-Harthi, M. A. (2013). Crystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalysts. Polymer Bulletin, 70(9), 2645–2656. doi:10.1007/s00289-013-0980-6
    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.
    Publisher
    Springer Nature
    Journal
    Polymer Bulletin
    DOI
    10.1007/s00289-013-0980-6
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00289-013-0980-6
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab

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