Polymerization of higher α-Olefins using a C s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis

Vasilios Kotzabasakis; Konstantinos Kostakis; Marinos Pitsikalis; Nikolaos Hadjichristidis; David J. Lohse; Thomas Mavromoustakos; Constantinos Potamitis

doi:10.1002/pola.23483

Polymerization of higher α-Olefins using a C _s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis

Vasilios Kotzabasakis, Konstantinos Kostakis, Marinos Pitsikalis, Nikolaos Hadjichristidis^*, David J. Lohse, Thomas Mavromoustakos, Constantinos Potamitis

^*Corresponding author for this work

Physical Sciences and Engineering

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

13 Scopus citations

Abstract

The C _s-symmetry hafnium metallocene [(p-Et ₃Si)C ₆H ₄] ₂C(2,7-di-tert-BuFlu) (C ₅H ₄)Hf(CH ₃) ₂ and tetrakis(pentafluorophenyl) borate dimethylanilinium salt ([B(C ₆F ₅) ₄] ^-[Me ₂NHPh] ⁺) were used as the catalytic system for the polymerization of higher α-olefins (from hexene-1 to hexadecene-1) in toluene at 0 °C. The evolution of the polymerization was studied regarding the variation of the molecular weight, molecular weight distribution and yield with time. The effect of the monomer structure on the polymerization kinetics was established. The role of trioctylaluminum in accelerating the polymerization was investigated. ¹³C NMR spectroscopy was used to study the microstructure of the poly(α-olefins) by the determination of the pentad monomer sequences. The thermal properties of the polymers were obtained by differential scanning calorimetry, DSC. The results were discussed in connection with the polymer microstructure.

Original language	English (US)
Pages (from-to)	4314-4325
Number of pages	12
Journal	Journal of Polymer Science, Part A: Polymer Chemistry
Volume	47
Issue number	17
DOIs	https://doi.org/10.1002/pola.23483
State	Published - Sep 23 2009

Keywords

Glass transition
Kinetics
Metallocene catalyst
Microstructure
α-olefins

ASJC Scopus subject areas

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.1002/pola.23483

Cite this

Kotzabasakis, V., Kostakis, K., Pitsikalis, M., Hadjichristidis, N., Lohse, D. J., Mavromoustakos, T., & Potamitis, C. (2009). Polymerization of higher α-Olefins using a C _s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis. Journal of Polymer Science, Part A: Polymer Chemistry, 47(17), 4314-4325. https://doi.org/10.1002/pola.23483

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title = "Polymerization of higher α-Olefins using a C s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis",

abstract = "The C s-symmetry hafnium metallocene [(p-Et 3Si)C 6H 4] 2C(2,7-di-tert-BuFlu) (C 5H 4)Hf(CH 3) 2 and tetrakis(pentafluorophenyl) borate dimethylanilinium salt ([B(C 6F 5) 4] -[Me 2NHPh] +) were used as the catalytic system for the polymerization of higher α-olefins (from hexene-1 to hexadecene-1) in toluene at 0 °C. The evolution of the polymerization was studied regarding the variation of the molecular weight, molecular weight distribution and yield with time. The effect of the monomer structure on the polymerization kinetics was established. The role of trioctylaluminum in accelerating the polymerization was investigated. 13C NMR spectroscopy was used to study the microstructure of the poly(α-olefins) by the determination of the pentad monomer sequences. The thermal properties of the polymers were obtained by differential scanning calorimetry, DSC. The results were discussed in connection with the polymer microstructure.",

keywords = "Glass transition, Kinetics, Metallocene catalyst, Microstructure, α-olefins",

author = "Vasilios Kotzabasakis and Konstantinos Kostakis and Marinos Pitsikalis and Nikolaos Hadjichristidis and Lohse, {David J.} and Thomas Mavromoustakos and Constantinos Potamitis",

year = "2009",

month = sep,

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doi = "10.1002/pola.23483",

language = "English (US)",

volume = "47",

pages = "4314--4325",

journal = "Journal of Polymer Science, Part A: Polymer Chemistry",

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Kotzabasakis, V, Kostakis, K, Pitsikalis, M, Hadjichristidis, N, Lohse, DJ, Mavromoustakos, T & Potamitis, C 2009, 'Polymerization of higher α-Olefins using a C _s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis', Journal of Polymer Science, Part A: Polymer Chemistry, vol. 47, no. 17, pp. 4314-4325. https://doi.org/10.1002/pola.23483

Polymerization of higher α-Olefins using a C _s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis. / Kotzabasakis, Vasilios; Kostakis, Konstantinos; Pitsikalis, Marinos et al.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 47, No. 17, 23.09.2009, p. 4314-4325.

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

TY - JOUR

T1 - Polymerization of higher α-Olefins using a C s-symmetry hafnium metallocene catalyst. Kinetics of the polymerization and microstructural analysis

AU - Kotzabasakis, Vasilios

AU - Kostakis, Konstantinos

AU - Pitsikalis, Marinos

AU - Hadjichristidis, Nikolaos

AU - Lohse, David J.

AU - Mavromoustakos, Thomas

AU - Potamitis, Constantinos

PY - 2009/9/23

Y1 - 2009/9/23

N2 - The C s-symmetry hafnium metallocene [(p-Et 3Si)C 6H 4] 2C(2,7-di-tert-BuFlu) (C 5H 4)Hf(CH 3) 2 and tetrakis(pentafluorophenyl) borate dimethylanilinium salt ([B(C 6F 5) 4] -[Me 2NHPh] +) were used as the catalytic system for the polymerization of higher α-olefins (from hexene-1 to hexadecene-1) in toluene at 0 °C. The evolution of the polymerization was studied regarding the variation of the molecular weight, molecular weight distribution and yield with time. The effect of the monomer structure on the polymerization kinetics was established. The role of trioctylaluminum in accelerating the polymerization was investigated. 13C NMR spectroscopy was used to study the microstructure of the poly(α-olefins) by the determination of the pentad monomer sequences. The thermal properties of the polymers were obtained by differential scanning calorimetry, DSC. The results were discussed in connection with the polymer microstructure.

AB - The C s-symmetry hafnium metallocene [(p-Et 3Si)C 6H 4] 2C(2,7-di-tert-BuFlu) (C 5H 4)Hf(CH 3) 2 and tetrakis(pentafluorophenyl) borate dimethylanilinium salt ([B(C 6F 5) 4] -[Me 2NHPh] +) were used as the catalytic system for the polymerization of higher α-olefins (from hexene-1 to hexadecene-1) in toluene at 0 °C. The evolution of the polymerization was studied regarding the variation of the molecular weight, molecular weight distribution and yield with time. The effect of the monomer structure on the polymerization kinetics was established. The role of trioctylaluminum in accelerating the polymerization was investigated. 13C NMR spectroscopy was used to study the microstructure of the poly(α-olefins) by the determination of the pentad monomer sequences. The thermal properties of the polymers were obtained by differential scanning calorimetry, DSC. The results were discussed in connection with the polymer microstructure.

KW - Glass transition

KW - Kinetics

KW - Metallocene catalyst

KW - Microstructure

KW - α-olefins

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JF - Journal of Polymer Science, Part A: Polymer Chemistry

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