Synthesis and modification of alternating copolymers based on vinyl ethers, chlorotrifluoroethylene, and hexafluoropropylene

Valade, David, Boschet, Frédéric and Améduri, Bruno (2009) Synthesis and modification of alternating copolymers based on vinyl ethers, chlorotrifluoroethylene, and hexafluoropropylene. Macromolecules, 42 20: 7689-7700. doi:10.1021/ma900860u


Author Valade, David
Boschet, Frédéric
Améduri, Bruno
Title Synthesis and modification of alternating copolymers based on vinyl ethers, chlorotrifluoroethylene, and hexafluoropropylene
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
1520-5835
Publication date 2009-10-27
Sub-type Article (original research)
DOI 10.1021/ma900860u
Volume 42
Issue 20
Start page 7689
End page 7700
Total pages 12
Place of publication Washington, DC, U.S.A.
Publisher American Chemical Society
Language eng
Formatted abstract
Fluorinated copolymers bearing ammonium groups were prepared by radical copolymerization of fluorinated olefins (chlorotrifluoroethylene, hexafluoropropylene) with different vinyl ethers (2-chloroethyl, cyclohexyl, n-butyl, and ethyl vinyl ethers) followed by the cationization of these copolymers with trimethylamine. Copolymers were obtained in high yield (generally >85%), with molecular weights ranging from 8000 to 25 000 g mol−1. From elemental analysis as well as 1H and 19F NMR spectroscopy, the alternating structure of these polymers was confirmed. The chemical modification of these copolymers consisted of a two-step reaction: (i) the replacement of the chlorine atom by an iodine atom followed by (ii) the substitution of the halogen atom by the trimethylamine into a quaternary ammonium. The resulting copolymers were characterized with the usual techniques to assess their compositions and structures. Their thermal analyses, in dynamic mode, under air, showed decomposition temperatures (Td,10%) higher than 200 °C. Electrochemical properties of some of these polymers were also studied, showing ionic exchange capacities (IEC) ranging from 0.50 to 0.75 mequiv g−1 (theoretical IEC up to 3.63 mequiv g−1) and water uptake of 13−25%.
Keyword Radiation-induced copolymerization
Anion-exchange membranes
Glass-transition temperatures
Nuclear-magnetic-resonance
Supercritical carbon-dioxide
Monomer reactivity ratios
Poly(vinylidene fluoride)
Terpolymer fluoroelastomers
Radical copolymerization
Sequence distribution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Wed, 09 Mar 2011, 23:48:53 EST