MODIFIED STYRENE-BUTADIENE STYRENE BLOCK-COPOLYMER MEMBRANES COMPLEXED WITH (N,N'-DISALICYLIDENEETHYLENEDIAMINE)COBALT(II) FOR OXYGEN PERMEATION - POLYMERIC AXIAL LIGAND EFFECT

Two kinds of modified styrene-butadiene-styrene triblock copolymer (SB S) were used as polymeric axial ligands in this work, one was modified by radiation-induced graft copolymerization to obtain styrene-butadie ne-styrene-g-vinylpyridine (SBS-g-VP), and the other was modified by e poxidation to obtain epoxidized styrene-butadiene-styrene block copoly mer (ESBS). Then the complex formation of modified SBS (SBS-g-VP or ES BS) with (N,N'-disalicylideneethylenediamine)cobalt(II) (CoS) in chlor oform solution was studied. Facilitated transport of molecular oxygen in modified SBS membranes containing CoS as fixed carrier of oxygen, a nd oxygen permeability in modified SBS membranes and oxygen binding ab ility to CoS were studied. The facilitation was enhanced in the polyme ric complexed membranes (SBS-g-VP-CoS and ESBS-CoS), and the different facilitated results of SBS-g-VP-CoS and ESBS-CoS are discussed.