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 A. 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 A. Al-Harthi^*

^*Corresponding author for this work

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.

Original language	English
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 - Sep 2013

Bibliographical note

Funding Information:
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.

Keywords

CRYSTAF
Copolymerization
Crystallinity
Metallocene
Polyethylene
Styrene

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Polymers and Plastics
Materials Chemistry

Access to Document

10.1007/s00289-013-0980-6

Cite this

@article{1a3c80424e444f3793acfa4b8354e08a,

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.",

keywords = "CRYSTAF, Copolymerization, Crystallinity, Metallocene, Polyethylene, Styrene",

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 A.\}",

note = "Funding Information: 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 = sep,

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

language = "English",

volume = "70",

pages = "2645--2656",

journal = "Polymer Bulletin",

issn = "0170-0839",

number = "9",

}

TY - JOUR

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 A.

N1 - Funding Information: 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 - 2013/9

Y1 - 2013/9

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.

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.

KW - CRYSTAF

KW - Copolymerization

KW - Crystallinity

KW - Metallocene

KW - Polyethylene

KW - Styrene

UR - https://www.scopus.com/pages/publications/84881118969

U2 - 10.1007/s00289-013-0980-6

DO - 10.1007/s00289-013-0980-6

M3 - Article

AN - SCOPUS:84881118969

SN - 0170-0839

VL - 70

SP - 2645

EP - 2656

JO - Polymer Bulletin

JF - Polymer Bulletin

IS - 9

ER -

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this