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SYNOPSISThe swelling behavior of a tightly cross-linked cellulose gel has been studied in various polar solvents as a function of temperature. Pronounced second-order transitions were observed at about 25 and 6 0 T , which may correspond to those previously reported in the literature dealing with cellulosic fibers. The transitions are attributed to changes in hydrogen bonding in the system.With the carboxymethyl and dicarboxymethyl derivatives of the cellulose gel, sharp second-order transitions were found at about 25 and 50"C, characterizing interactions involving carboxyl groups. The solvent dependence of the swelling behavior is pronounced.No temperature dependence of swelling was observed with acetylated, methylated,and trimethylsilylated forms of the gel, in which systems hydrogen bonding has been effectively eliminated. 261

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The synthesis of tightly cross‐linked cellulose gels in bead form is described. Their ability to separate low molecular weight polyethylene oxides as a function of molecular size is demonstrated. With cellulose‐80 and water as eluant, chemisorption was found with the cellodextrins at chain lengths greater than three units. Weak adsorption was found for the xylodextrins and mannodextrins in the comparable size interval. The results suggest that an exact structural correspondence between adsorbent and adsorbate is necessary for the adsorption of oligosaccharides to cellulose. With DMSO as eluant, the separations are determined by a partitioning bearing a direct relationship to the liquid‐liquid partitioning coefficient in thin layer chromatography.