Table 5.
Permeability and selected selectivity of PIM-b-PEG multiblock copolymers of different PEO content from time lag measurements with four gases at 30 °C.
| Multiblock Copolymers | PEG wt % | Permeability (Barrer) | Selectivity | |||||
|---|---|---|---|---|---|---|---|---|
| N2 | O2 | CO2 | CH4 | CO2/N2 | O2/N2 | CO2/CH4 | ||
| PIM(25)-b-PEO(0.2) | 1.6 | 260 | 700 | 5240 | 480 | 20.1 | 2.7 | 10.9 |
| PIM(10)-b-PEO(0.2) | 2.5 | 250 | 650 | 4660 | 420 | 18.6 | 2.6 | 11.1 |
| PIM(25)-b-PEO(1) | 4.1 | 200 | 520 | 3830 | 330 | 19.1 | 2.6 | 11.6 |
| PIM(25)-b-PEO(2) | 7.5 | 150 | 380 | 2690 | 250 | 18.0 | 2.5 | 10.8 |
| PIM(10)-b-PEO(1) | 9.3 | 140 | 370 | 3000 | 270 | 22.3 | 2.8 | 11.1 |