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Macko T, Arndt JH, Yu Y, Brüll R. Temperature gradient interaction chromatography of linear polyethylene and isotactic polypropylene. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
AbstractThe application of temperature gradient interaction chromatography (TGIC) as an advanced technique for the characterisation of polymers is discussed, in comparison to other liquid chromatography techniques and in particular the ubiquitous size exclusion chromatography. Specifically, the use of reversed-phase TGIC for the interrogation of complex branched polymers and normal-phase TGIC for characterisation of high-molar mass end-functionalised polymers is highlighted.
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Abstract
AbstractThe asymmetric star polymers are studied by coarse grain simulations. Each polymer chain is represented by number of consecutive soft blobs and additional uncrossability constraints are added to prevent chain crossings. In this work two types of asymmetric star polymers with different backbone lengths are structured. Their dynamical properties are discussed by comparisons with corresponding linear chains, the one covers chain length along with the asymmetric arm through the branch point to one of the symmetric arm, or the backbone chain between two symmetric arm ends, or the largest linear possesses the same molecular weight of the entire star. To reveal the influence of the asymmetric arm length on their relaxation decay times, the autocorrelation function of the vectors from each branching point to corresponding asymmetric arm end are calculated, results are compared with the symmetric star having the same backbone chain.
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Yolsal U, Hutchings LR. Synthesis and coupling of ABx polysiloxane macromonomers to form highly branched polysiloxanes. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Liu P, Ma H, Han L, Yang L, Shen H, Li C, Li Y. The effect of amine-functionalized 1,1-diphenylethylene (DPE) derivatives on end-capping reactions and the simulation of their precision for sequence control. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Pagliarulo A, Hutchings LR. End-Functionalized Chains via Anionic Polymerization: Can the Problems with Using Diphenylethylene Derivatives be Solved by using Bisphenol F? MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Liu P, Ma H, Shen H, Han L, Chang S, Zang L, Bian Y, Bai Y, Li Y. Study on the Mechanism of a Side Coupling Reaction during the Living Anionic Copolymerization of Styrene and 1-(Ethoxydimethylsilyphenyl)-1-phenylethylene (DPE-SiOEt). Polymers (Basel) 2017; 9:polym9050171. [PMID: 30970850 PMCID: PMC6432263 DOI: 10.3390/polym9050171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 04/24/2017] [Accepted: 05/08/2017] [Indexed: 11/21/2022] Open
Abstract
A 1,1-diphenylethylene (DPE) derivative with an alkoxysilyl group (DPE-SiOEt) was synthesized. It was end-capped with poly(styryl)lithium (PSLi) and then copolymerized with styrene via living anionic polymerization (LAP) in a non-polar solvent at room temperature. The observed side coupling reaction was carefully investigated by end-capping the polymer. Changes in molecular weight support the plausibility of a mechanism involving living anionic species (PSLi or lithiated DPE-end-capped polystyrene, PSDLi) and the alkoxysilyl groups. Through a series of copolymerizations with different feed ratios, the kinetics of the side coupling reaction were also studied. The results showed that the side reactions could be controlled using an excess feed of DPE-SiOEt, a potentially useful strategy for the synthesis and application of well-defined alkoxysilyl-functionalized polymers via LAP.
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Affiliation(s)
- Pibo Liu
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Hongwei Ma
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Heyu Shen
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Li Han
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Shuang Chang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Long Zang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Yiyu Bian
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Yu Bai
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Yang Li
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
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Huang Q, Agostini S, Hengeller L, Shivokhin M, Alvarez NJ, Hutchings LR, Hassager O. Dynamics of Star Polymers in Fast Extensional Flow and Stress Relaxation. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01348] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qian Huang
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Serena Agostini
- Durham
Centre for Soft Matter, Department of Chemistry, Durham University, Durham, United Kingdom
| | - Ludovica Hengeller
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Maksim Shivokhin
- Center
for Molecular Study of Condensed Soft Matter and Department of Chemical
and Biological Engineering, Illinois Institute of Technology, Chicago, Illinois 60616, United States
| | - Nicolas J. Alvarez
- Department
of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Lian R. Hutchings
- Durham
Centre for Soft Matter, Department of Chemistry, Durham University, Durham, United Kingdom
| | - Ole Hassager
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby, Denmark
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Hutchings LR, Agostini S, Hamley IW, Hermida-Merino D. Chain Architecture as an Orthogonal Parameter To Influence Block Copolymer Morphology. Synthesis and Characterization of Hyperbranched Block Copolymers: HyperBlocks. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02052] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Lian R. Hutchings
- Durham
Centre for Soft Matter, Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | | | - Ian W. Hamley
- Department
of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
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Hutchings LR, Agostini S, Oti ME, Keth J. Normal-phase (temperature gradient) interaction chromatography – A powerful tool for the characterisation of high molecular weight chain-end functionalised polymers. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hutchings LR, Brooks PP, Parker D, Mosely JA, Sevinc S. Monomer Sequence Control via Living Anionic Copolymerization: Synthesis of Alternating, Statistical, and Telechelic Copolymers and Sequence Analysis by MALDI ToF Mass Spectrometry. Macromolecules 2015. [DOI: 10.1021/ma5016038] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lian R. Hutchings
- Durham Centre for Soft Matter,
Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Paul P. Brooks
- Durham Centre for Soft Matter,
Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - David Parker
- Durham Centre for Soft Matter,
Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Jackie A. Mosely
- Durham Centre for Soft Matter,
Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Serkan Sevinc
- Durham Centre for Soft Matter,
Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
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Synthesis of Well-Defined Three-Arm Star-Branched Polystyrene through Arm-First Coupling Approach by Atom Transfer Radical Polymerization. INT J POLYM SCI 2015. [DOI: 10.1155/2015/961914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Here we describe a simple route to synthesize three-arm star-branched polystyrene. Atom transfer radical polymerization technique has been utilized to yield branched polystyrene involving Williamson coupling strategy. Initially a linear polymeric chain of predetermined molecular weight has been synthesized which is further end-functionalized into a primary alkyl bromide moiety, a prime requisition for Williamson reaction. The end-functionalized polymer is then coupled using 1,1,1-tris(4-hydroxyphenyl)ethane, a trifunctional core molecule, to give well-defined triple-arm star-branched polystyrene.
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