A Process for Polymerizing Vinyl Phosphonic Acid with C6F13I Perfluoroalkyl Iodide Chain-Transfer Agent
✍ Scribed by Ghislain David; Cyrille Boyer; Russell Tayouo; Shane Seabrook; Bruno Ameduri; Bernard Boutevin; Gary Woodward; Mathias Destarac
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 306 KB
- Volume
- 209
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
The synthesis of oligomeric VPA structures via the CTA perfluorohexyl iodide has been investigated. NMR and MALDI‐TOF MS analysis showed that the structures were produced exclusively by radical‐transfer reactions. The oligomers had a molecular weight above 2 000 g · mol^−1^ and exhibited intra‐ and intermolecular anhydrous bonding. The investigation showed that the reaction is not a living (controlled) system, but follows conventional radical telomerization. The value for the transfer constant for C~6~F~13~I to VPA was found to be 3.4 at 70 °C and 4.3 at 80 °C. This high value may be partially explained by a low k/k~t~ ratio, which suggests a low k~p~. The oligomeric structures showed a relatively high resistance to thermal degradation.
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