ABSTRACT
The effect of plasticizer was modeled by the addition to system Eq. (21) and the replacement of Eq. (19) by
and the effect of concentration of this filler has been investigated. The results are shown in Figs. 11 and 12. Up to certain value the increase of Cr accelerates water sorption (see curves wI, and w2 in Fig. 12) and the release of solute (see curves sl and s2 in Fig. 12), and their kinetics and shape of the water sorption isotherm (see curves 1 and 2 in Fig. 11) remain unchanged. Then, however, remarkable changes come in (curves w3w6, s3s6 in Fig. 12). This effect may be explained by the increase of the solubility of solute. Accordingly, the contribution of solute in the solubility of water becomes negligible, and this changes the shape of water isotherm (see curves 3-6 in Fig. 11). Further acceleration of solute release also occurs with the change in its kinetics.
