AbstractThe volume changes which a cellulose gel swollen with water undergoes on immersion in aqueous glycerol solutions containing from 10–80 glycerol have been studied. If the gel is considered from the standpoint of dry cellulose plus glycerol solution, the volume contraction (compared with the theoretical sum of the volumes of the components) is less than 1 over the entire range of glycerol concentrations studied. When the unsoftened gel film is immersed in softener solution, the volume increase of the gel is small (1–5, corresponding to a concentration of 10–60 glycerol in the softener bath). It may therefore be concluded that, except possibly at very high glycerol contents, the internal volume relationships for softened and unsoftened gel film are the
展开▼
