Correlation between Cohesive Energy Density, Fractional Free Volume, and Gas Transport Properties of Poly(ethylene-co-vinyl acetate) Materials

Figure 4

Correlation of the CO₂ diffusion coefficients with (a) 1/FFV and (b) CED/FFV for both pure EVA copolymers (□) and their blends (+). Numbers next to the points indicate vinyl acetate content in a given material. Straight lines represent linear regression of the experimental data.

(a)

(b)