| Abstract: | The permeation of oxygen dissolved in water through substituted polyacetylene membranes was studied by using an oxygen electrode at 25°C. Many of the membranes (thickness about 200 μm) showed high apparent permeability coefficients P in the range 10?9?10?8 cm3 (STP) cm cm?2s?1 cmHg?1. The resistance r of the boundary layer and the permeability P∞, at infinite membrane thickness were determined from the dependence of P on membrane thickness. The r values of Si-containing and aliphatic polyacetylenes were usually larger than those of aromatic polyacetylenes. The P∞, values of Si-containing and aliphatic polyacetylenes agreed closely with the permeability coefficients Pg for gaseous oxygen. In contrast, P∞ values for aromatic polyacetylenes were larger than Pg values. |
