Formation of microporous Teflon® PFA membranes via thermally induced phase separation

Michael R. Caplan, Chung Yuan Chiang, Douglas R. Lloyd, Larry Y. Yen

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Poly(tetrafluoroethylene-co-perfluoro-(propyl vinyl ether)) (Teflon® PFA) membranes of a variety of structures have been produced through thermally induced phase separation of Teflon® PFA-chlorotrifluoroethylene melt-blends of different compositions. A phase diagram of the two component system was constructed, and electron microscopy was used to characterize the structures of membranes produced. The morphological characteristics of the Teflon® PFA membranes have been explained on the basis of equilibrium driving forces for liquid-liquid and solid-liquid phase separations.

Original languageEnglish (US)
Pages (from-to)219-237
Number of pages19
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Jul 23 1997


  • Formation
  • Microporous membranes
  • Phase separation
  • Teflon® PFA

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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