DESORPTION BEHAVIOR OF POLYSTYRENE FROM POROUS-GLASS BEADS - STUDIED BY CONTINUOUS ELUTION METHOD

A new analytical method for studying polymer adsorption/desorption, wh ich is termed the ''continuous elution method'', has been developed. I n this method, preadsorbed adsorbent powders are packed into a small c olumn, solvent elution is performed and the concentration of polymer d esorbed from the adsorbent surface is measured. By this method, the ad sorption/desorption behavior of polystyrene on/from the surface of con trolled-pore glass (CPG-10) has been investigated over a wide range of these samples. It is revealed that the continuous elution method prov ides new information about the polymer adsorption layer, and the polym er layer, whose radius of gyration in the solution is roughly equal to the pore size of the adsorbent, takes up a special flattened conforma tion affected by the narrow pore surface, and shows a specific broad p rofile of the desorption elution curve.