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. 2014 Jan 24;47(3):1021–1029. doi: 10.1021/ma401869p

Figure 7.

Figure 7

Double logarithmic “Robeson” plots of (a) H2/CO2, (b) H2/CH4 and (c) H2/N2 selectivity versus H2 permeability showing Robeson’s 2008 upper bound29 (solid line), and for H2/CH4 the 1991 upper bound30 (dashed line), with data for amine–PIM-1 as cast (⧫), ethanol-treated (◊), after aging for 18 months (▲) and methanol-treated after aging (Δ), compared with literature data19 for PIM-1 as cast (●) and methanol-treated (○), for thioamide–PIM-17 as cast (■) and ethanol-treated (□), and for PIM-1 hydrolyzed under various conditions4 (×).