Gas permeability coefficients for several gases (Ar, N2, C02, CH4) were measured at 25 °C in two polystyrene/polybutadiene block copolymer systems.One possesses a morphology of alternating lamellae that are highly oriented and perpendicular to the permeation direction; the second contains spheres of polybutadiene in a polystyrene matrix.The measured permeabilities of these two materials are domi- nated by the behavior of the low permeability polystyrene component.Models are presented to describe transport in these microphase-separated systems and to facilitate comparisons with the transport behavior of other two-component polymer systems.
No takes yet. Share an insight, caveat, or question.
Csernica et al. (1990) studied this question.