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Fuentes-Exposito M, Norsic S, Février T, Dugas PY, Boutti S, Devisme S, Bonnet A, D'Agosto F, Lansalot M. Surfactant-free emulsion polymerization of vinylidene fluoride mediated by RAFT/MADIX reactive poly(ethylene glycol) polymer chains. Polym Chem 2021. [DOI: 10.1039/d1py00728a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Vinylidene fluoride (VDF) emulsion polymerization is conducted in the presence of xanthate-end functionalized poly(ethylene glycol)s leading to stable PVDF latexes.
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Affiliation(s)
- Mathieu Fuentes-Exposito
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Sébastien Norsic
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Thibaut Février
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Pierre-Yves Dugas
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Salima Boutti
- ARKEMA, Centre de Recherche Rhône-Alpes (CRRA), Rue Henri Moissan - CS 42063, 69491 Pierre-Bénite Cedex, France
| | - Samuel Devisme
- ARKEMA, Centre de recherche, développement, applications et technique de l'ouest (Cerdato), 13 route de Launay, 27470 Serquigny, France
| | - Anthony Bonnet
- ARKEMA, Centre de Recherche Rhône-Alpes (CRRA), Rue Henri Moissan - CS 42063, 69491 Pierre-Bénite Cedex, France
| | - Franck D'Agosto
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Muriel Lansalot
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
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Abstract
Synthesis of semifluorinated polymers containing fluorous groups on the backbone or as side chains is an increasingly popular field of research.
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Affiliation(s)
- Joseph A. Jaye
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
| | - Ellen M. Sletten
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
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Defluorination of Polytetrafluoroethylene Surface by Hydrogen Plasma. Polymers (Basel) 2020; 12:polym12122855. [PMID: 33260483 PMCID: PMC7760809 DOI: 10.3390/polym12122855] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/25/2020] [Accepted: 11/27/2020] [Indexed: 11/30/2022] Open
Abstract
Defluorination of polytetrafluoroethylene (PTFE) surface film is a suitable technique for tailoring its surface properties. The influence of discharge parameters on the surface chemistry was investigated systematically using radio-frequency inductively coupled H2 plasma sustained in the E- and H-modes at various powers, pressures and treatment times. The surface finish was probed by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The measurements of water contact angles (WCA) showed increased wettability of the pristine PTFE; however, they did not reveal remarkable modification in the surface chemistry of the samples treated at various discharge parameters. By contrast, the combination of XPS and ToF-SIMS, however, revealed important differences in the surface chemistry between the E- and H-modes. A well-expressed minimum in the fluorine to carbon ratio F/C as low as 0.2 was observed at the treatment time as short as 1 s when plasma was in the H-mode. More gradual surface chemistry was observed when plasma was in the E-mode, and the minimal achievable F/C ratio was about 0.6. The results were explained by the synergistic effects of hydrogen atoms and vacuum ultraviolet radiation.
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