Table 8.

Apparent activation energy for permeation (Ep), evaluated in the temperature range 15–55 °C, for Pebax^®2533 films (‘as prepared’).

Preparation Method	Solvent	Activation Energy for Permeability (kJ mol−1)
		CO2	CH4	O2	N2	He	H2
Solution casting	ethanol	18.5	30.8	29.5	34.4	28.0	27.6
	i-propanol	18.6	31.0	30.1	34.6	28.3	28.0
	1-butanol	18.4	30.8	29.3	33.2	26.2	28.3
	HFIP	21.9	34.5	31.9	37.9	31.9	30.7
Hot press	–	19.0	31.2	30.3	34.5	28.2	28.1