Table 1 Optimization of reaction conditions^a

^aReaction conditions: PTFE (particle size: 2.63 µm, 0.60 mmol, 1.0 equiv), sodium dispersion, anhydrous solvent (0.24 M), under N₂ with 350 rpm magnetic stirrer. PTFE is a polymer composed of repeating tetrafluoroethylene units (C₂F₄, MW = 100). Sodium dispersion (SD Super Fine™, 25 wt% sodium dispersion in mineral oil) was used unless otherwise noted. For calculations in this study, we used 100 as the molecular weight of each repeating unit of PTFE. Each C₂F₄ unit in PTFE reacts with 4 moles of sodium (Na) to form 4 moles of NaF. Therefore, when we refer to one equivalent of PTFE and one equivalent of Na, this corresponds to 1 mole of PTFE and 4 moles of Na. Similarly, two equivalents of Na indicates 8 moles of sodium.
^bYield (NaF) was determined by the average of two ion chromatography measurements of fluoride ion.
^cPTFE (6.0 mmol, 1.0 equiv).
^dPTFE (particle size, 200 µm) was used.
^eReaction was conducted under slower stirring (200 rpm).
^fSodium dispersion (Aldrich, sodium, 25–35 wt% dispersion in paraffin) was employed.
^gPTFE (particle size: 2.63 µm, 0.15 mmol, 1.0 equiv), sodium dispersion, TEMPO (2.0 equiv), THF (1.0 mL), under N₂ with 350 rpm magnetic stirrer.

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