Talk:ECTFE
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Permeability
[edit]Yes, it ECTFE has low permeability for a fluoropolymer, but "the best"? Better than PVF? From "Permeability Properties of Plastics and Elastomers" and manufacturer datasheets for the two products we see the following:
cm³-mm/m²-day-atm H2: PVF = 22.9@24°C, ECTFE = 108@25°C He: PVF = 59.1@24°C, ECTFE = 1798@25°C CO2: PVF = 4,4@24°C, ECTFE = 90@15°C N2: PVF = 0.1@24°C, ECTFE = 1.23@25°C or 10.0@25°C (sources vary) O2: PVF = 1.3@24°C, ECTFE = 9,9@25°C or 45.6°25°C (sources vary)
Water permeability seems to be about the same, though. But in general, PVF is about on par with PET. ECTFE... isn't. Even though it's orders of magnitude better than, say, PTFE.
Also... the article claims that ECTFE's permeability properties are a consequence of the size of the chlorine atom. Is that... actually the case? -- Rei (talk) 03:54, 17 July 2016 (UTC)
- @Rei Almost eight years later, these issues still stand. The claim regarding this material's permeability is very ambiguous and almost reads like a sentence fragment. The following sentence describing the permeability being a consequence "of the chlorine atom" is also very vague and doesn't really convey any useful information.
- I would like to revise this section, but I'm afraid I don't know enough about the topic of permeability in polymers. Flidbouillon (talk) 04:33, 12 February 2025 (UTC)