THE COPOLYMER OF POLYPYRROLONE AND POLYPHENYLQUINOXALINE FOR GAS SEPARATION

The gas transport properties for H-2, O-2 and N-2 in five random copol ymers of polypyrrolone and polyphenylquinoxaline and the two homopolym ers have been determined at 30 degrees C and 1 atm. The polypyrrolone exhibits higher selectivity with lower permeability, whereas polypheny lquinoxaline shows lower selectivity with higher permeability. The per meability of the copolymers increase with increasing polyphenylquinoxa line content but the selectivities decrease. Temperature dependence of the gas permeability is reported for one copolymer, which is the same as in other glassy polymers.