Table 3.

Gas separation performance of PEG-based polybenzoxazine.

Polymers	Permeability Coefficient (Barrer 1)				Permselectivity
	O2	N2	CO2	CH4	O2/N2	CO2/N2	CO2/CH4
Poly(BZ-JD230)	11	2	55	11	5.4	27.6	4.6
Poly(BZ-JED600)	14	4	128	12	3.4	31.8	11.8
Poly(BZ-JED900)	21	8	345	22	2.7	43.5	15.7

¹ $\mathrm{Barrer}=1\ast {10}^{-10}·\frac{{\mathrm{cm}}_{\mathrm{STP}.}^3\mathrm{cm}}{{\mathrm{cm}}^3.\sec .\mathrm{cmHg}}$.