Polyacrylates molecular weight data

Contrary to other atmospheric gases like N2, O2 or CO2, the permeability of polymer films for SO2 is very high (Table III). Obviously the molecular size of SO2 is not the dominating factor for its permeation rate. As the permeability coefficient P is defined by the product of the diffusion coefficient, D, and the solubility, S, the SO2 solubility of the polymer films plays an Important role. In fact the few data published on solubility of SO2 in polymers corroborate this expectation. Equilibrium solubility of SO2 in polyacrylate was found to be as high as 21.5% by weight at 760 mmHgl. In case of a bisphenol A polycarbonate. 

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