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

Muhammad Shahzad Kamal; Bijal Kottukkal Bahuleyan; Omer Bin Sohail; Abdul-Hamid M. Emwas; John E. Bercaw; Mamdouh Ahmed Al-Harthi

doi:10.1007/s00289-013-0980-6

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

Muhammad Shahzad Kamal, Bijal Kottukkal Bahuleyan, Omer Bin Sohail, Abdul-Hamid M. Emwas, John E. Bercaw, Mamdouh Ahmed Al-Harthi

Imaging & Characterization Core Lab

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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.

Original language	English (US)
Pages (from-to)	2645-2656
Number of pages	12
Journal	Polymer Bulletin
Volume	70
Issue number	9
DOIs	https://doi.org/10.1007/s00289-013-0980-6
State	Published - Jun 6 2013

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.

ASJC Scopus subject areas

Materials Chemistry
Polymers and Plastics
General Chemistry
Condensed Matter Physics

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10.1007/s00289-013-0980-6

Cite this

@article{c297e403e09d431c9341ea57774063af,

title = "Crystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalysts",

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. {\textcopyright} 2013 Springer-Verlag Berlin Heidelberg.",

author = "Kamal, {Muhammad Shahzad} and Bahuleyan, {Bijal Kottukkal} and Sohail, {Omer Bin} and Emwas, {Abdul-Hamid M.} and Bercaw, {John E.} and Al-Harthi, {Mamdouh Ahmed}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.",

year = "2013",

month = jun,

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doi = "10.1007/s00289-013-0980-6",

language = "English (US)",

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T1 - Crystallization analysis fractionation of poly(ethylene-co-styrene) produced by metallocene catalysts

AU - Kamal, Muhammad Shahzad

AU - Bahuleyan, Bijal Kottukkal

AU - Sohail, Omer Bin

AU - Emwas, Abdul-Hamid M.

AU - Bercaw, John E.

AU - Al-Harthi, Mamdouh Ahmed

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.

PY - 2013/6/6

Y1 - 2013/6/6

N2 - 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.

AB - 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.

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JO - Polymer Bulletin

JF - Polymer Bulletin

IS - 9

ER -

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

Abstract

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