Fractionation of reactive perfluoropolyoxyalkylene oligomers

Medientyp: E-Artikel
Titel: Fractionation of reactive perfluoropolyoxyalkylene oligomers
Beteiligte: Levi, Marinella; Turri, Stefano
Erschienen: Wiley, 1995
Erschienen in: Journal of Applied Polymer Science
Sprache: Englisch
DOI: 10.1002/app.1995.070550703
ISSN: 0021-8995; 1097-4628
Schlagwörter: Materials Chemistry ; Polymers and Plastics ; Surfaces, Coatings and Films ; General Chemistry
Entstehung:
Anmerkungen:
Beschreibung: <jats:title>Abstract</jats:title><jats:p>Fractional distillation, solubility fractionation, and column chromatographic separation have been applied in the study of fractionation of perfluoropoly(oxymethylene‐<jats:italic>co</jats:italic>‐oxy‐ethylene) oligomers with CH<jats:sub>2</jats:sub>OH end units, containing mono and bifunctional species. With a suitable choice of conditions, all three techniques proved to be useful for the preparation of fractions with narrow molecular weight distribution. Column chromatography allowed the separation of fractions having, in addition, sharp mono and bifunctionality. On the bsis of the experimental results, general indications for designing reactive oligomers fractionation procedures are discussed, prevalently centered on the copolymer end effect, which is typically present in this kind of compound. © 1995 John Wiley & Sons. Inc.</jats:p>

Nur in Feld suchen: