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Atomic oxygen: most and least resistant

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Erosion after 3.95 years outside the ISS, compared with Kapton H, the reference film. Lower is better. Source: NASA/TM-2008-215490.

RankMaterialCompared with Kapton HLost in 3.95 years
1White TedlarCrystalline polyvinylfluoride with white pigment0.034×8.5 µm
2PTFEPolytetrafluoroethylene0.047×12 µm
3PFAPerfluoroalkoxy copolymer resin0.058×15 µm
4AFAmorphous fluoropolymer0.066×17 µm
5FEPFluorinated ethylene propylene0.067×17 µm
…
36PMMAPolymethyl methacrylate>1.87×>472 µm
37CR-39Allyl diglycol carbonate>2.27×>573 µm
38PBTPolybutylene terephthalate3.04×768 µm
39DelrinPolyoxymethylene (acetal)3.05×771 µm
40Upilex-SPolyimide (BPDA)3.07×777 µm