Abstract
Well-defined α,ω-diiodo-poly(vinylidene fluoride (VDF)-co-hexafluoropropylene (HFP)) with a narrow unimodal molecular weight distribution (polydispersity index < 1.3) was subjected to iodine transfer polymerization, which allows controlled “pseudo-living” free radical telomerization. The molecular weight of the obtained polymer increased linearly with polymerization time, and the molecular weight distribution was determined by size exclusion chromatography. The prepared α,ω-diiodo-poly(VDF-co-HFP) was converted to α,ω-bis(hydroxyethyl)-poly(VDF-co-HFP) as a novel telechelic fluoropolyol by incorporation of ethylene units and subsequent hydrolysis with aqueous bicarbonate (acting as a nucleophile and phasetransfer reagent) in hexamethylphosphoramide, a polar aprotic solvent. The obtained fluorinated polyol was characterized by 1H, 13C, and 19F NMR and exhibited a molecular weight below 3,000 Da, making it a suitable telechelic fluorinated prepolymer for the synthesis of fluorinated polyurethanes or their acrylate oligomers.
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Acknowledgments: This work was supported by POSCO (project No. 2015P070).
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Lee, Jh., Lee, B., Won, Jw. et al. Synthesis of novel telechelic fluoropolyols based on vinylidene fluoride/hexafluoropropylene copolymers by iodine transfer polymerization. Macromol. Res. 25, 1028–1034 (2017). https://doi.org/10.1007/s13233-017-5137-2
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DOI: https://doi.org/10.1007/s13233-017-5137-2