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Piriyakulkit P, Kanoknukulchai K, Potisatityuenyong A, Anantawaraskul S. Cocrystallization of Polyethylene Blends during TREF–GPC Cross‐Fractionation Characterization. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Piriyakorn Piriyakulkit
- Center of Excellence for Petroleum Petrochemicals and Advanced Materials (PPAM) Department of Chemical Engineering Faculty of Engineering Kasetsart University Bangkok 10900 Thailand
| | | | | | - Siripon Anantawaraskul
- Center of Excellence for Petroleum Petrochemicals and Advanced Materials (PPAM) Department of Chemical Engineering Faculty of Engineering Kasetsart University Bangkok 10900 Thailand
- Center for Advanced Studies in Nanotechnology for Chemical Food and Agricultural Industries Kasetsart University Bangkok 10900 Thailand
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Ndiripo A, Ndlovu PZ, Albrecht A, Pasch H. Improving temperature gradient interaction chromatography of polyolefins by simultaneous use of different stationary phases. J Chromatogr A 2021; 1653:462416. [PMID: 34332317 DOI: 10.1016/j.chroma.2021.462416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/13/2021] [Accepted: 07/14/2021] [Indexed: 10/20/2022]
Abstract
Temperature gradient interaction chromatography (TGIC) at high temperatures is a powerful method for the chemical composition separation of polyolefins. TGIC is a two-step process where the sample is crystallized on the stationary phase at low temperature followed by the elution of the sample components using a temperature gradient towards high temperatures. For TGIC typically a porous graphitic carbon (PGC) stationary phase is used. The separation mechanism is based on crystallization and adsorption/desorption phenomena and it has been shown that co-crystallization and co-adsorption may affect the separation. The present study reports on the simultaneous use of a non-adsorptive and an adsorptive stationary phase (column) in series to utilize both crystallization and adsorption for improved separation in TGIC. A silica column is used as the non-adsorptive support to allow for the crystallization of the polyolefin sample in the absence of an adsorptive force followed by the typical PGC column for adsorption/desorption. Accordingly, the loci of crystallization and adsorption/desorption are well separated from each other and can be adjusted independently. This novel column setup allows the sample to be introduced slowly onto the second (adsorptive) column eliminating possible co-adsorption and poor selectivity. Low molar mass polyethylene comprising of oligomers with approximately C30C130 was used to illustrate the importance of a non-adsorptive column for improved separation. Utilizing a non-adsorptive silica column allows for higher dynamic flow rates during crystallization, which improves separation. Shorter adsorptive columns are found to be more efficient in this experimental protocol as compared to standard TGIC experiments. Smaller PGC column sizes result in reduced longitudinal and Eddy diffusion and, hence, higher resolution of low and high molar mass polyolefins.
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Affiliation(s)
- Anthony Ndiripo
- Department of Chemistry and Polymer Science, Stellenbosch University, PO Box X1, 7602 Stellenbosch, South Africa; Center Macromolecular Structure Analysis, Leibniz-Institut für Polymer Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany; Department of Applied Chemistry National University of Science and Technology, Box Ac. 939 Ascot, Bulawayo, Zimbabwe.
| | - Petronella Zabesuthu Ndlovu
- Department of Chemistry and Polymer Science, Stellenbosch University, PO Box X1, 7602 Stellenbosch, South Africa
| | - Andreas Albrecht
- Borealis Polyolefine GmbH, St. Peter-Strasse 25, Linz 4021, Austria
| | - Harald Pasch
- Department of Chemistry and Polymer Science, Stellenbosch University, PO Box X1, 7602 Stellenbosch, South Africa.
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Liu W, Hong M, Xue Y, Shi L, Li P, Li R, Zhang M, An Y, Gao Y, Ji X. Comparison of chain microstructure between two propylene−ethylene copolymer resins with bimodal melting temperature distribution. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Plüschke L, Ndiripo A, Mundil R, Merna J, Pasch H, Lederer A. Fractionation of chain walking polyethylene and elucidation of branching, conformation and molar mass distributions. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2020. [DOI: 10.1080/1023666x.2020.1840865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Laura Plüschke
- Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany
- Technische Universität Dresden, Dresden, Germany
| | - Anthony Ndiripo
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, South Africa
| | - Robert Mundil
- Department of Polymers, University of Chemistry and Technology, Prague, Czech Republic
| | - Jan Merna
- Department of Polymers, University of Chemistry and Technology, Prague, Czech Republic
| | - Harald Pasch
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, South Africa
| | - Albena Lederer
- Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany
- Technische Universität Dresden, Dresden, Germany
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, South Africa
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Jeremic L, Albrecht A, Sandholzer M, Gahleitner M. Rapid characterization of high-impact ethylene–propylene copolymer composition by crystallization extraction separation: comparability to standard separation methods. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2020. [DOI: 10.1080/1023666x.2020.1821151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Magagula SI, Ndiripo A, Johannes van Reenen A. Heterophasic ethylene-propylene copolymers: New insights on complex microstructure by combined molar mass fractionation and high temperature liquid chromatography. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2019.109022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kot D, Macko T, Arndt JH, Brüll R. Porous graphite as platform for the separation and characterization of synthetic polymers – an overview. J Chromatogr A 2019; 1606:360038. [DOI: 10.1016/j.chroma.2019.02.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/21/2019] [Accepted: 02/12/2019] [Indexed: 10/27/2022]
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Studying the bivariate tacticity distribution of poly-1-octene using two-dimensional liquid chromatography coupled with NMR. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.04.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Brunel F, Boyron O, Clement A, Boisson C. Molecular Dynamics Simulation of Ethylene/Hexene Copolymer Adsorption onto Graphene: New Insight into Thermal Gradient Interaction Chromatography. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201800496] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Fabrice Brunel
- Chemistry, CatalysisPolymers and Processes (C2P2) UMR 5265, CNRS, CPE Lyon, Université Lyon 1, 43 Bvd. du 11 Novembre 1918 F‐69615 Villeurbanne France
| | - Olivier Boyron
- Chemistry, CatalysisPolymers and Processes (C2P2) UMR 5265, CNRS, CPE Lyon, Université Lyon 1, 43 Bvd. du 11 Novembre 1918 F‐69615 Villeurbanne France
| | - Arnaud Clement
- Chemistry, CatalysisPolymers and Processes (C2P2) UMR 5265, CNRS, CPE Lyon, Université Lyon 1, 43 Bvd. du 11 Novembre 1918 F‐69615 Villeurbanne France
| | - Christophe Boisson
- Chemistry, CatalysisPolymers and Processes (C2P2) UMR 5265, CNRS, CPE Lyon, Université Lyon 1, 43 Bvd. du 11 Novembre 1918 F‐69615 Villeurbanne France
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Ndiripo A, Albrecht A, Monrabal B, Wang J, Pasch H. Chemical Composition Fractionation of Olefin Plastomers/Elastomers by Solvent and Thermal Gradient Interaction Chromatography. Macromol Rapid Commun 2018; 39:e1700703. [DOI: 10.1002/marc.201700703] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/04/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Anthony Ndiripo
- Department of Chemistry and Polymer Science; University of Stellenbosch; Private Bag X1 Matieland 7602 South Africa
| | - Andreas Albrecht
- Borealis Polyolefine GmbH; St. Peter-Strasse 25 4021 Linz Austria
| | - Benjamin Monrabal
- Polymer Char; Valencia Technology Park; Gustave Eiffel 8 46980 Paterna Spain
| | - Jingbo Wang
- Borealis Polyolefine GmbH; St. Peter-Strasse 25 4021 Linz Austria
| | - Harald Pasch
- Department of Chemistry and Polymer Science; University of Stellenbosch; Private Bag X1 Matieland 7602 South Africa
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Liu Y, Phiri MJ, Ndiripo A, Pasch H. Chemical composition separation of a propylene–ethylene random copolymer by high temperature solvent gradient interaction chromatography. J Chromatogr A 2017; 1522:23-29. [DOI: 10.1016/j.chroma.2017.09.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 06/04/2017] [Accepted: 09/19/2017] [Indexed: 11/30/2022]
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Al-Khazaal AZ, Soares JBP. Joint Effect of Poly(ethyhlene-co-1-octene) Chain Length and 1-Octene Fraction on High-Temperature Thermal Gradient Interaction Chromatography. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Abdulaal Z. Al-Khazaal
- Department of Chemical Engineering; University of Waterloo; Waterloo Ontario N2L 3G1 Canada
| | - João B. P. Soares
- Department of Chemical and Materials Engineering; University of Alberta; Edmonton Alberta T6G 2V4 Canada
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