Interaction of polymers in solution with porous solids. I. Penetration of porous glass by dextran

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Abstract
Measurements of the penetration of porous substrates (porous glasses) by non-sorbing macromolecules (dextrans) have yielded penetration curves that relate the degree of penetration to molecular size. Combinations of well-characterized polymer fractions with a series of uniformly porous glasses have demonstrated that, in agreement with the theory, the penetration is dependent only on the relative size of the molecule and the pore. Several models differing in the methods of characterizing the sizes of the pores and solute molecules have been compared. The predictions of the shape of the penetration curves are similar for most models and are in similar agreement with the experimental data.

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