POLYMER ANALYSIS USING SIZE-EXCLUSION CHROMATOGRAPHY WITH COUPLED DENSITY AND REFRACTIVE-INDEX DETECTION .6. MOLECULAR-MASS DEPENDENCE OF PREFERENTIAL SOLVATION OF POLYOXYETHYLENES IN CHLOROFORM WITH DIFFERENT ETHANOL CONTENTS

It is shown that preferential solvation of polyoxyethylenes with hydroxy and methoxy end-groups in chloroform containing ethanol takes place mainly at the hydroxy end-groups, but also along the main chain. A method is described that allows a separate determination of the adsorbed ethanol molecules per repeating unit and per end-group.