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Perfluoropolyethers and functionalized perfluoropolyethers have been shown to exhibit high solubility in liquid and supercritical carbon dioxide. A perfluoropolyether oil, Krytox 16350, molecular weight (MW) of 11 350, was fractionated into 14 monodisperse fractions using carbon dioxide at 373 K at pressures between 20.69 MPa and 34.47 MPa. The molecular weights of these fractions, determined using...
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